Answers
Answer:
4. 16
5. $88
6. $687.50
Step-by-step explanation:
4. Let n represent the number.
An expression representing the number multiplied by 0.9 and 6.3 subtracted from the product is ...
0.9n -6.3
We want that result to be 4.5, so we have the equation ...
0.9n -6.3 = 4.5
Since all of the coefficients are divisible by 0.9, we can divide by 0.9 to get ...
n -7 = 9
Adding 7 gives ...
n = 16
The number is 16.
_____
5. For a problem like this, I like to work it backward. If Craig got an extra $18, then everyone's share was $32 -18 = $14. That was the share from a 5-way split, so the amount the friends split evenly was 5×$14 = $70. The total they started with must have been $70 +18 = $88.
The amount they split unevenly was $88. The amount they split evenly, after setting aside $18 for Craig's parents, was $70.
__
It is a bit tricky to write one equation for the amount the friends started with before they did any splits. Call that amount A. Then after setting aside $18, they split (A-18) five ways. Each of those splits was then (A-18)/5. When the $18 was added to one of those, the result was the $32 that Craig got. So, we have ...
(A -18)/5 +18 = 32
and the solution process is similar to the "working backward" description above: subtract 18, multiply by 5, add back 18.
(A -18)/5 = 14
A -18 = 70
A = 88 . . . . . . . . the amount the friends split unevenly
_____
6. Let P represent the original price of the laptop. We're told the price after all of the discounts was 500, so we have ...
P -50 -(0.20P) = 500
0.80P = 550 . . . . . add 50, collect terms
P = 687.50 . . . . . . . divide by the coefficient of P
The original price was $687.50.
Related Questions
I need help justifying why my classification is correct
Answers
Answer:
7) 6 is not a perfect square, sqrt(6) can't be written in a fraction form
8) 2 is not a perfect cube, cuberoot of 2 can't be written in a fraction form
9) 3/2 is already a fraction, so clearly rational
Leah asked her dance students to each hand out at least 10 flyers advertising their upcoming dance recital. She constructed a histogram to display the number of recital flyers handed out by the students.
Answers
Leah asked her dance students to hand out at least 10 flyers for their upcoming dance recital and construct a histogram to display the data.
Explanation:In this question, Leah asked her dance students to each hand out at least 10 flyers for their upcoming dance recital. Then, she constructed a histogram to display the number of recital flyers handed out by the students.
To solve this, Leah can tally the number of students who handed out a specific number of flyers and create intervals on the x-axis of the histogram to represent the number of flyers. The height of each bar in the histogram will represent the number of students who handed out the corresponding number of flyers. By constructing the histogram, Leah can visualize the distribution of the number of flyers handed out by her dance students.
Final answer:
The question is related to Mathematics, specifically the creation and analysis of histograms, frequency tables, and probability distributions, often used in statistics to visualize and interpret various sets of data.
Explanation:
The student's question falls under the subject of Mathematics, specifically related to statistics and data analysis. In this instance, various exercises are mentioned where the creation and interpretation of histograms are central. These exercises are multifaceted, requiring students to compile data, calculate statistical measures such as means and probabilities, and graphically represent data using histograms and other charts.
For example, when Leah asks her dance students to hand out flyers, she is gathering data that can be represented in a histogram to visualize the distribution of flyers handed out. Similarly, the ballet instructor's data on retention rates can form a probability distribution. When Jill delivers flyers for her yard sale, her travel distances and times could be used to create a time series graph.
Histograms, frequency tables, and probability distributions are tools used in these exercises to better understand the data collected, whether it's related to dance flyer distribution, car sales, or family size among classmates.
Statistics!! Please help, 10 points and brainliest!
1. You are comparing the heights of contemporary males and eighteenth-century males. The sample mean for a sample of 30 contemporary males is 70.1 inches with a sample standard deviation of 2.52 inches. The sample mean for eighteenth-century males was 65.2 inches with a sample standard deviation of 3.51 inches. Is there sufficient data to conclude that contemporary males are taller than eighteenth-century males?
A. The p-value is less than 0.00001. There is insufficient data to reject the null hypothesis.
B. The p-value is greater than 0.00001. There is sufficient data to reject the null hypothesis.
C. The p-value is greater than 0.00001. There is insufficient data to reject the null hypothesis.
D. The p-value is less than 0.00001. There is sufficient data to reject the null hypothesis.
Answers
Answer:
[tex]t=\frac{70.1-65.2}{\frac{2.52}{\sqrt{30}}}=10.65[/tex]
[tex]p_v =P(t_{(29)}>10.65)=7.76x10^{-12}[/tex]
And the best conclusion for this case would be:
D. The p-value is less than 0.00001. There is sufficient data to reject the null hypothesis.
Step-by-step explanation:
Data given and notation
[tex]\bar X=70.1[/tex] represent the sample mean
[tex]\sigma=2.52[/tex] represent the population standard deviation
[tex]n=30[/tex] sample size
[tex]\mu_o =65.2[/tex] represent the value that we want to test
[tex]\alpha[/tex] represent the significance level for the hypothesis test.
t would represent the statistic (variable of interest)
[tex]p_v[/tex] represent the p value for the test (variable of interest)
State the null and alternative hypotheses.
We need to conduct a hypothesis in order to check if the mean is higher than 65.2, the system of hypothesis would be:
Null hypothesis:[tex]\mu \leq 65.2[/tex]
Alternative hypothesis:[tex]\mu > 65.2[/tex]
If we analyze the size for the sample is = 30 but we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:
[tex]t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}[/tex] (1)
t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".
Calculate the statistic
We can replace in formula (1) the info given like this:
[tex]t=\frac{70.1-65.2}{\frac{2.52}{\sqrt{30}}}=10.65[/tex]
P-value
The first step is calculate the degrees of freedom, on this case:
[tex]df=n-1=30-1=29[/tex]
Since is a one side right tailed test the p value would be:
[tex]p_v =P(t_{(29)}>10.65)=7.76x10^{-12}[/tex]
And the best conclusion for this case would be:
D. The p-value is less than 0.00001. There is sufficient data to reject the null hypothesis.
The correct option is D. The p-value is less than [tex]0.00001.[/tex] There is sufficient data to reject the null hypothesis.
Hypotheses:
Null hypothesis [tex](\(H_0\)): \(\mu_1 = \mu_2\)[/tex] (the mean height of contemporary males is equal to the mean height of eighteenth-century males)
Alternative hypothesis [tex](\(H_1\)): \(\mu_1 > \mu_2\)[/tex] (the mean height of contemporary males is greater than the mean height of eighteenth-century males)
Given Data:
Sample mean for contemporary males [tex](\(\bar{x}_1\)) = 70.1 inches[/tex]
Sample standard deviation for contemporary males [tex](\(s_1\)) = 2.52 inches[/tex]
Sample size for contemporary males [tex](\(n_1\)) = 30[/tex]
Sample mean for eighteenth-century males [tex](\(\bar{x}_2\)) = 65.2 inches[/tex]
Sample standard deviation for eighteenth-century males [tex](\(s_2\)) = 3.51\ inches[/tex]
Sample size for eighteenth-century males [tex](\(n_2\)) = 30[/tex]
Test Statistic:
We use a two-sample t-test for the difference of means:
[tex]\[t = \frac{\bar{x}_1 - \bar{x}_2}{\sqrt{\frac{s_1^2}{n_1} + \frac{s_2^2}{n_2}}}\][/tex]
Substituting the given values:
[tex]\[t = \frac{70.1 - 65.2}{\sqrt{\frac{2.52^2}{30} + \frac{3.51^2}{30}}}\][/tex]
First, calculate the variances and their respective terms:
[tex]\[s_1^2 = 2.52^2 = 6.3504, \quad s_2^2 = 3.51^2 = 12.3201\][/tex]
[tex]\[\frac{s_1^2}{n_1} = \frac{6.3504}{30} = 0.21168, \quad \frac{s_2^2}{n_2} = \frac{12.3201}{30} = 0.41067\][/tex]
[tex]\[\sqrt{\frac{s_1^2}{n_1} + \frac{s_2^2}{n_2}} = \sqrt{0.21168 + 0.41067} = \sqrt{0.62235} = 0.7889\][/tex]
Now calculate the t-value:
[tex]\[t = \frac{70.1 - 65.2}{0.7889} = \frac{4.9}{0.7889} = 6.21\][/tex]
Degrees of Freedom:
Since the sample sizes are the same, we can use the following approximation for degrees of freedom [tex]df[/tex]
[tex]\[df = n_1 + n_2 - 2 = 30 + 30 - 2 = 58\][/tex]
P-value:
Using a t-distribution table or a calculator for a one-tailed test with [tex]58[/tex] degrees of freedom, we find that a t-value of [tex]6.21[/tex] corresponds to a p-value much less than [tex]0.00001.[/tex]
Which equation could you use to solve for x in the proportion StartFraction 4 over 5 EndFraction = StartFraction 9 over x EndFraction? 4 x = 14 4 x = 45 5 x = 13 5 x = 36
Answers
Answer:
(b) 4 x = 4 5 is the needed expression to solve for the value of x.
Step-by-step explanation:
Here, the given proportion is simplified as:
[tex]\frac{4}{5} = \frac{9}{x}[/tex]
Now, to simplify any proportion of the form [tex]\frac{a}{b} = \frac{c}{d}[/tex] the simplest way is CROSS MULTIPLICATION.
So, cross multiplying [tex]\frac{a}{b} = \frac{c}{d} \implies ad = bc[/tex]
Similarly cross multiplying [tex]\frac{4}{5} = \frac{9}{x}[/tex], we get:
4 (x) = (9) (5)
or, 4 x = 45
Hence, 4 x = 45 is the needed expression to solve for the value of x.
Answer:
4x=45
Step-by-step explanation:
4/5=9/x, so first you would multiply 5×9 (because cross products are always equal) and you would get 45. Since 4x has to also equal 45, the answer is 4x=45.
Hope this helps (P.S. I got it right on the test)!
At the moment a hot iron rod is plunged into freezing water, the difference between the rod's and the water's temperatures is 100\degree100°100, degree Celsius. This causes the iron to cool and the temperature difference drops by 60\%60%60, percent every second. Write a function that gives the temperature difference in degrees Celsius, D(t)D(t)D, left parenthesis, t, right parenthesis, ttt seconds after the rod was plunged into the water.
Answers
Answer:
[tex]D(t)=100(0.4)^t[/tex]
Step-by-step explanation:
The temp is 100 at time t = 0
After 1 sec, the temp difference would be:
[tex]100-(\frac{100-60}{100})[/tex]
After 2 sec, the temp difference would be:
[tex]100-(\frac{100-60}{100})^2[/tex]
Similarly for 3 seconds, 4 seconds etc.
We notice that the parenthesis part is 40% of it, so we can also write:
100(40%)^t,
where
t is the time
40% can be written as 40/100 = 0.4
SO, the function is:
[tex]d(t)=100(0.4)^t[/tex]
Answer:
[tex]D(t)=100*0.4^t[/tex]
Step-by-step explanation:
Initially, the difference between the rod's and the water's temperatures is 100°
i.e D(t)=100 When t=0
After 1 seconds, the temp drops by 60%.
Therefore, the new value of D will be the old value multiplied by (100-60)%.
D(1)=100 X (100%-60%) = 100*0.4
After 2 seconds, the temp difference would be:
D(2)=100*0.4*0.4= [tex]100*0.4^2[/tex]
We notice that for any t, the percentage at which the difference is reduced is raised to the power of t.
Therefore, temperature difference in degrees Celsius, D(t), t seconds after the rod was plunged into the water is given as:
[tex]D(t)=100*0.4^t[/tex]
The power P required to do a fixed amount of work varies inversely as the time t. If a power of 15 J/h is required to do a fixed amount of work in 2 hours, what is the power required to do the same work in 1 hour?
Answers
Answer: the power required to do the same work in 1 hour is 30 j/h
Step-by-step explanation:
If two variables vary inversely, an increase in one of the variables causes a decrease in the other variable and vice versa.
The power P required to do a fixed amount of work varies inversely as the time t. If we introduce a constant of variation, k, the expression would be
P = k/t
If a power of 15 J/h is required to do a fixed amount of work in 2 hours, it means that
15 = k/2
k = 15 × 2 = 30
The equation becomes
P = 30/t
Therefore, the power required to do the same work in 1 hour is
P = 30/1 = 30 j/h
During the 2004 season, New York theater goers bought 11.3 million tickets for a total of $749.0 . Theater goers spent a total of 3.2% more than the year before. What was the totalamount spent during 2003?
Answers
Answer:
The total amount spent during 2003 was $725.78.
Step-by-step explanation:
Given:
During the 2004 season, New York theater goers bought 11.3 million tickets for a total of $749.0 . Theater goers spent a total of 3.2% more than the year before.
Now, to find the total amount that was spent during 2003.
Let the amount spent during 2003 be [tex]x.[/tex]
The amount spent during 2004 = $749.0.
As, given theater goers spent a total of 3.2% more than the year before.
So, we put equation to get the amount spent during 2003:
[tex]x+3.2\%\ of\ x=749[/tex]
[tex]x+\frac{3.2}{100} \times x=749[/tex]
[tex]x+\frac{3.2x}{100}=749[/tex]
[tex]\frac{100x+3.2x}{100} =749[/tex]
[tex]\frac{103.2x}{100} =749[/tex]
Multiplying both sides by 100 we get:
[tex]103.2x=74900[/tex]
Dividing both sides by 103.2 we get:
[tex]x=\$725.78[/tex]
Therefore, the total amount spent during 2003 was $725.78.
A set of computer science exam scores are normally distributed with a mean of 71.33 point, and a standard deviation of 3 points. What proportion of the exam scores are between 68 and 77.99 points?
Answers
Approximately 85.33% of the exam scores are between 68 and 77.99 points.
To find the proportion of exam scores between 68 and 77.99 points in a normally distributed set, we can use the Z-score formula:
[tex]\[ Z = \frac{X - \mu}{\sigma} \][/tex]
where X is the score, [tex]\( \mu \)[/tex] is the mean, and [tex]\( \sigma \)[/tex] is the standard deviation.
Given:
- Mean [tex]\( \mu = 71.33 \)[/tex]
- Standard deviation [tex]\( \sigma = 3 \)[/tex]
- We need to find the proportion of scores between [tex]\( X_1 = 68 \)[/tex] and [tex]\( X_2 = 77.99 \)[/tex].
1. Calculate the Z-scores for [tex]\( X_1 = 68 \)[/tex]:
[tex]\[ Z_1 = \frac{68 - 71.33}{3} = \frac{-3.33}{3} = -1.11 \][/tex]
2. Calculate the Z-scores for [tex]\( X_2 = 77.99 \)[/tex]:
[tex]\[ Z_2 = \frac{77.99 - 71.33}{3} = \frac{6.66}{3} = 2.22 \][/tex]
Next, we look up these Z-scores in the standard normal distribution table or use a calculator to find the corresponding proportions:
- The proportion corresponding to [tex]\( Z_1 = -1.11 \)[/tex] is approximately 0.1335.
- The proportion corresponding to [tex]\( Z_2 = 2.22 \)[/tex] is approximately 0.9868.
The proportion of scores between [tex]\( X_1 = 68 \)[/tex] and [tex]\( X_2 = 77.99 \)[/tex] is the difference between these two proportions:
[tex]\[ P(68 < X < 77.99) = P(Z < 2.22) - P(Z < -1.11) \][/tex]
[tex]\[ P(68 < X < 77.99) = 0.9868 - 0.1335 = 0.8533 \][/tex]
If Naomi were to paint her living room alone, it would take 5 hours. Her sister Jackie could do the job in 8 hours. How many hours would it take them working together? Express your answer as a fraction reduced to lowest terms, if needed.
Answers
Answer: it would take them 40/13 hours
Step-by-step explanation:
If Naomi were to paint her living room alone, it would take 5 hours. it means that the rate at which she paint her living room alone is 1/5
Her sister Jackie could do the job in 8 hours. it means that the rate at which Jackie paint the living room is 1/8
If they work together, they would work simultaneously and their individual rates are additive. This means that their combined working rate would be
1/5 + 1/8 = (8 + 5)/40 = 13/40
Assuming it takes t hours for both of them to clean the room working together, the working rate per hour would be 1/t. Therefore,
13/40 = 1/t
t = 40/13 hours
What is the measure of angle x? 1) 10 2) 18 3) 20 4) 25
Answers
Answer:
what is the actual problem?
Step-by-step explanation:
A farmer has 90 feet of fence with which to make a corral. If he arranges it into a rectangle that is twice as long as it is wide, what are the dimensions
Answers
Answer:
W = 15 ft. and L = 30 ft.
Step-by-step explanation:
Perimeter = 90 ft.
Twice as long as it is wide: L=2W
P = 2(L + W) = 2(2W + W) = 6W
90 = 6W
W = 15 ft. and L = 30 ft.
Answer:
The dimensions are: Width= 15ft
Length=30ft
Step-by-step explanation:
Perimeter of fence=90feet
He wants to make a rectangle with dimensions length and with.
The rectangle length is twice as long as the width= L= 2W
Perimeter of a rectangle = 2(L + W)
90= 2(2W +W)
90= 6W
90/6=W=15ft
L=2W= 2× 15=30ft
You shuffle a standard 52 card deck of cards, so that any order of the cards is equally likely, than draw 4 cards. How many different ways are there to make that draw, where you care about the order
Answers
Answer:
270725 different ways
Step-by-step explanation:
The problem tells us that the order of the letters does not matter. Therefore, in the combination the order is NOT important and is signed as follows:
C (n, r) = n! / r! (n - r)!
We have to n = 52 and r = 4
C (52, 4) = 52! / 4! * (52-4)! = 52! / (4! * 48!) = 270725
Which means that there are 270725 different ways in total to make that raffle
Please Help! A cylinder has a diameter of 5 m and a height of 10 m. What is its volume? Choose all that apply.?
A. π(2.5)^2 (10) m^3
B. π(5)^2 (10) m^3
C. 62.5π m^3
D. 250π m^3
Answers
Answer:
D
Step-by-step explanation:
Cause if you se it close you wil get it
An Olympic-size swimming pool is approximately 50 meters long by 25 meters wide. What distance will a swimmer travel if they swim from one corner to the opposite?
Answers
The swimmer will travel a distance of 55.92 meters when swimming from one corner to the opposite corner of an Olympic-size swimming pool.
Given, the length and width of the pool form the two sides of the right-angled triangle, and the distance the swimmer will travel is the hypotenuse.
Using the Pythagorean theorem, we can calculate the distance as follows:
Distance² = Length² + Width²
Distance² = 50² + 25²
Distance² = 2500 + 625
Distance² = 3125
Distance = √3125
Distance = 55.90 meters
Therefore, a swimmer will travel approximately 55.92 meters.
Learn more about Pythagoras's theorem here:
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Final answer:
To determine the distance a swimmer travels across an Olympic-sized pool from corner to opposite, the Pythagorean theorem is used, giving approximately 55.90 meters as the distance.
Explanation:
The student's question entails calculating distances and speeds in different swimming and water current scenarios, which is a classic physics problem involving kinematics and geometry. However, since it involves calculations and applying formulae, particularly the Pythagorean theorem, and rate, time, and distance relationships, it falls under the subject of Mathematics.
To Calculate the Distance Swum Across an Olympic-sized Pool
For an Olympic-sized pool that is 50 meters in length and 25 meters in width, a swimmer traveling from one corner to the opposite would traverse a diagonal. To calculate this diagonal distance, we use the Pythagorean theorem:
Diagonal2 = Length2 + Width2
Diagonal = √(Length2 + Width2)
Substitute the given values:
Diagonal = √(502 + 252) = √(2500 + 625)
Diagonal = √(3125) meters
The swimmer will travel approximately √(3125) meters, which is about 55.90 meters.
The mean salary for a new teacher in your town is $48,000. You believe it is higher for new teachers in a neighboring town. State the null and alternative hypotheses.
Answers
Answer:
Step-by-step explanation:
Given that the mean salary for a new teacher in your town is $48,000
You believe it is higher for new teachers in a neighboring town.
So to prove or disprove your claim you have to show statistical evidence.
For that hypothesis testing is necessary.
You must conduct a hypothesis test for comparing the mean of salary of new teacher with neighbouring places
The hypotheses wouldbe
[tex]H_0: \mu = 48000\\H_1: \mu >48000[/tex]
where mu is the average for neighbouring states.
A dolphin starts at an elevation of -16 3/4 feet. He kicks 5 times and increases his elevation by the same amount for each kick. He is now at an elevation of -5 1/4 feet. Which equation can be used to find x, the number of feet the dolphin traveled with each kick?
Answers
Answer:
[tex]x = 2\,\frac{4}{5}\,ft[/tex]
Step-by-step explanation:
The equation of elevation for the dolphin is:
[tex]-\frac{67}{4} + 5\cdot x = -\frac{21}{4}[/tex]
[tex]5\cdot x = \frac{56}{4}[/tex]
[tex]x = 2\,\frac{4}{5}\,ft[/tex]
Answer:
5x -16 3/4 = -5 1/4
Note: This is based off of Study Island's multiple choice answers
Step-by-step explanation:
We're trying to figure out how far the dolphin travels with each kick. The dolphin starts at an elevation of -16 3/4 feet and ends up at an elevation of -5 1/4 feet. In other words, what can we add to -16 3/4 to get -5 1/4?
The elevation is our variable (x). The dolphin kicks 5 times to get from point a to point b. So we should add 5x to -16 3/4 to get -5 1/4. This equation will solve for the length in feet traveled per kick. Our equation is now:
5x + -16 3/4 = -5 1/4
Adding a negative is the same thing as subtracting a positive, so our final equation is:
5x - 16 3/4 = -5 1/4
If we want to solve this:
5x - 16.75 = -5.25
5x = 11.5
x = 2.3 feet per kick
The prices (in dollars) of 50 randomly chosen types of shoes at 4 different stores are shown in the box plots. At which store would a person MOST LIKELY pay $60 for a pair of shoes?
Answers
Answer:
C
Step-by-step explanation:
I think you missed attaching the picture, so hope my photo fits your questions well!
We must consider the median of the data sets, it may represent the center of the dispersion measure. Then we see answer C is the most suitable one, this is because it's median is approximately to $60.
Members of a hospital advisory committee will be selected from 5 doctors and 4 nurses. The committee must have 2 doctors and 2 nurses.
How many possible combinations of doctors and nurses could be chosen for the committee?
Answers
Answer:
16 possible ways
Step-by-step explanation:
Using the formular Cp,k= p!/I! (P-k)!
Where k= number of selected committee members
P= available number that can sit in the committee
For doctors,there are 5 doctors
C= 5!/2!(3)!= 120/12 = 10ways
For nurses,there are 4
C= 4!/2!(2)! = 24/4 =6ways
Total possible ways=10 + 6 = 16 ways
Answer:
60
Step-by-step explanation:
(2 out of 5 doctors) * (2 out of 4 nurses)
Which of the following regression models is used to model a nonlinear relationship between the independent and dependent variables by including the independent variable and the square of the independent variable in the model?
a. multiple regression model
b. a least squares regression model
c. quadratic regression model
d. a simple regression model
Answers
Answer:
Option C) Quadratic regression model
Step-by-step explanation:
Quadratic regression model
It is regression model in which states a non-linear relationship between the independent and dependent variables.It includes the dependent variable and the square of the independent variable.[tex]\hat{y}= b_0 + b_1x + b_2x^2[/tex]where x is the independent variable and [tex]\hat{y}[/tex] is the dependent variable.
It is also referred to as second-order polynomial model.It is used when the data shape resembles to a parabola.Thus, the correct answer is
Option C) Quadratic regression model
The (c) quadratic regression model is used to model a nonlinear relationship between the independent and dependent variables by including the independent variable and the square of the independent variable.
Explanation:The correct answer to this question is C. Quadratic regression model. In statistics, a quadratic regression model is used to model a nonlinear relationship between the independent and the dependent variables. This is achieved by including the independent variable and the square of the independent variable in the model. For example, if 'x' is the independent variable, the model would include both 'x' and 'x²'. The quadratic term allows for the model to fit simple curved relationships between the dependent and independent variable. The other models listed, such as multiple regression model, least squares regression model and a simple regression model, tend to represent linear relationships.
Here is a simple illustrative example: suppose you wanted to model the relation between the amount of fertilizer used (independent variable 'x') and the height of a plant (dependent variable 'y'). If the relation isn't linear (meaning more fertilizer does not always result in more growth, and growth rate declines after a certain point, forming a curved pattern in the data), you could use a quadratic regression model
Learn more about Quadratic regression model here:https://brainly.com/question/31504314
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Add a party there were four large submarine sandwiches all the same size during the party 2/3 of the chicken sandwich three force of a turn a sandwich 712s of the roast beef sandwich and 5/6 of the veggie sandwich or eat it which sandwich had the least amount
Answers
Answer:
Veggie
Step-by-step explanation:
I corrected your question for a better situation.
At a party there were four large submarine sandwiches all the same size . During the party 2/3 of the chicken sandwich three over 4 of the tuna sandwich 7/12 of the roast beef sandwich and 5/6 of the veggie sandwich were eating which sandwich had the least amount left
Here is my answer:
Chicken sandwich left: 1 - 2/3 =1/3 Tuna sandwich left = 1 - 3/4 = 1/4 Roast sandwich left = 1 -7/12 = 5/12 Veggie sandwich left = 1 - 5/6 = 1/6So the sandwich had the least amount is Veggie
In order for a film camera with a lens of fixed focal length F to focus on an object located a distance x from the lens, the film must be placed a distance y behind the lens. F, y, and x are related as follows: 1/F=1/X+ 1/Y. Now suppose a camera has a lens with focal length F = 65.1. Explain what happens to the focusing distance y as the object moves far away from the lens.2. Explain what happens to the focusing distance y as the object moves closer and closer to the lens.3. In general, why is it not possible to cross a vertical asymptote?
Answers
Answer:
y will increase if x is increased,
y will decrease if x is decreased.
Step-by-step explanation:
1/F=1/X+ 1/Y
1/F-1/X=1/Y
X-F/FX=1/Y
FX/X-F=Y
Rearranging, Y=FX/X-F
So this is the function in terms of X, and F is just a constant
Therefore, the function becomes Y=65X/X-65
Explanation:
y = focusing distance
x = distance from lens
Focusing distance y will increase if the object x moves far away from the lens i.e. x is increased,
Similarly, focusing distance y will decrease if the object x moves closer and closer to the lens i.e. x is decreased.
An asymptote is a function that mimics a curve f(x) as x approaches infinity.
A vertical asymptote, however, cannot be crossed in a function. Remember that a function cannot have multiple y values for a given x value, hence the vertical line test for a function. If a function crossed a vertical asymptote and then went back to it, then it would have to go back over itself as it becomes arbitrarily close to the asymptote. Therefore, it is not possible to cross a vertical asymptote.
The focal point, F, the object distance from the lens, X, and the image distance from the the lens, Y, vary according to the lens formula
1. The value of the focusing distance, Y, is negative and increases in
magnitude, when X < 65, and positive and decreasing in magnitude when
X > 65, the line X = 65 is a vertical asymptote.
2. When X > 65, the value of Y is positive and increasing as the object
moves closer to the lens. At X = 65, there is no image when 0 ≤ X < 65, the
value of Y is negative and increasing towards 0.
3. A vertical asymptote is a discontinuity, where the function is not defined
Reasons:
Known;
[tex]\dfrac{1}{F} = \dfrac{1}{X} + \dfrac{1}{Y}[/tex]
Where;
F = The focal length
X = Object distance from lens
Y = Location of film = Image distance from lens
(a) Given that F = 65, we have;
[tex]\dfrac{1}{65} = \dfrac{1}{X} + \dfrac{1}{Y}[/tex]
[tex]\dfrac{1}{65} - \dfrac{1}{X} = \dfrac{1}{Y}[/tex]
[tex]Y = \dfrac{65 \cdot X}{X - 65}[/tex]
Given that 65·X > X - 65 When X > [tex]-\dfrac{65}{64}[/tex], we have;
As X is increased, Y is decreases, with the rate of decrease reducing as the
value of X gets larger.
(b) As the object moves closer to the lens, when X > 65, the value of Y
increases, at X = 65, the value of Y is infinity, which is a vertical asymptote,
as the object moves closer, the value of Y becomes negative, with the
value increasing (becoming less negative) and when X = 0, Y = 0
3. It is not possible to cross the asymptote because the function has a
discontinuity at the asymptote, which represent the point where the image
is at infinity, such that giving that the distance of the image increases as X
approaches the asymptote, crossing the asymptote results in the image
located further than infinity (which is impossible).
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What is the result when the following code is run? double x = 1; double y = 1; int i = 0; do { y = x / 2; x = x + y; i = i + 1; } while (x < 2.5); System.out.print(i + " ");
Answers
Answer:
The answer is: 3
Step-by-step explanation:
1. At the begining of the program we start by declairing the variables:
double x=1, double y=1 and int i=0.
2. The structure do...while is used to defined the loop. x<2.5 is the finalization condition of the loop. i is the counter of the loop.
y=x/2 is the first calculation
x=x+y is the second one. Here is where the values of the variable x changes.
a) for the first iteration, the values of y and x are shown below:
[tex]\\\\x=1\\y=1\\y=1/2=0.5\\x=1+0.5=1.5\\i=1[/tex]
The variable x is minor to 2.5 so the loop will continue computing.
b) the second iteration, the values of y and x are shown below::
[tex]y=0.5\\x=1.5\\y=\frac{1.5}{2}=0.75\\ x=1.5+0.75=2.25\\i=2[/tex]
The variable x is still minor to 2.5 so the loop will continue computing.
c) third iteration:
[tex]y=0.75\\x=2.25\\y=\frac{2.25}{2} =1.1125\\x=2.25+1.125=3.375\\i=3[/tex]
The condition x<2.5 is not true so the loop ends.
3. System.out.print(i + " "); displays the value of the variable i wich value is 3.
Therefore the number 3 is display.
A population of scores has µ = 50 and σ = 5. If every score in the population is multiplied by 3, then what are the new values for the mean and standard deviation?
Answers
Answer:
The new mean = 3 × (the old mean) = 150
The new standard deviation is also = 3 × (The old standard deviation) = 15
Step-by-step explanation:
µ = 50 and σ = 5
The mean is the sum of variables divided by the number of variables.
Mean = (Σx)/N = µ = 50
x = each variable
N = number of variables
If each variable changed to 3x
Mean becomes
Mean = (Σ(3x))/N = 3 (Σx)/N = 3 × µ = 3 × 50 = 150.
The standard deviation is the square root of variance. And variance is an average of the squared deviations from the mean.
The standard deviation measures the rate of spread of the data set around the mean.
Standard deviation = σ = √[Σ(x - µ)²/N]
x = each variable
µ = mean
N = number of variables
If each variable changed to 3x
Recall µ changed to 3µ
Standard deviation = σ = √[Σ(3x - 3µ)²/N]
σ = √[Σ 3² (x - µ)²/N] = √[(3²)Σ(x - µ)²/N] = 3×√[Σ(x - µ)²/N] = 3 × σ = 3 × 5 = 15
If every score is multiplied by 3, it is logical to reason that the average of the new set of numbers also is 3× the old average.
And the new set of numbers spread out similarly around this new mean, only that the new space of spread is now 3× the old one.
When every score in a population is multiplied by a constant, both the mean and the standard deviation are multiplied by that constant. So, in the given example, the new mean would be 150 and the new standard deviation would be 15.
Explanation:In mathematics, when every score in a population is multiplied by a constant, both the mean (µ) and the standard deviation (σ) are also multiplied by that constant.
So, if every score in a population with µ = 50 and σ = 5 is multiplied by 3, the new mean (µ_new) would be 50 * 3 = 150, and the new standard deviation (σ_new) would be 5 * 3 = 15.
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In a certain college, 33% of the physics majors belong to ethnic minorities. If 10 students are selected at random from the physics majors, that is the probability that no more than 6 belong to an ethnic minority. True or false?
Answers
Answer:
False
Step-by-step explanation:
We are told that there is a 33% probability that physics students belong to ethnic minorities, therefore if the sample is 10 people, the amount would be given as follows:
10 * 33% = 3.3 people would be from ethnic minorities. What means of those 10 no more than 4 (to round the number) people belong to an ethnic minority.
Therefore, this statement is false, because it does not represent exactly the probability established in the university.
It is possible to clarify that what affirmation is true part because it fulfills what it says, because the probability says that 4 or less, and the affirmation says that 6 or less, however, the affirmation mentions that it corresponds to the probability of 33% and that if it is false, to correspond it should be between 51% and 60%.
Marcos made a fruit salad. It contains 6 strawberries, 5 mango slices, 18 grapes, and 2 kiwis. What is the ratio of the number of strawberries to grapes? Express the ratio in simplest form.
3:9
3:1
1:3
9:3
Answers
Answer:
1 : 3
Step-by-step explanation:
The ratio of strawberries : grapes = 6 : 18 ( divide both values by 6 )
ratio = 1 : 3 ← in simplest form
Answer:
1 : 3
Step-by-step explanation:
The ratio of strawberries : grapes = 6 : 18 ( divide both values by 6 )
ratio = 1 : 3 ← in simplest form
-2 -1 0 1 2 fx 1/8 1/4 1/2 1 2 what is the initial value of the exponential function represented by the table
Answers
Answer:
Step-by-step explanation:
The standard form of an exponential function is
[tex]y=a(b)^x[/tex] , where a is the initial value and b is the growth factor.
You will always find your initial value at the y value where x = 0. From your table where x = 0 and y = 1/2:
[tex]\frac{1}{2}=a(b)^0[/tex]
Any number or variable raised to the power of 0 = 1, therefore
[tex]\frac{1}{2}=a(1)[/tex] which gives us an initial value, a, of 1/2.
Which is the area between the x-axis and y=x from x=3 to x=6
63
45/2
27/2
81
Answers
Answer:
27/2
Step-by-step explanation:
Brinley is making headbands for her friends.Each headband needs 16 and a half inches of elastic and she has 132 inches of elastic.Use the guess,check,and revise strategy to solve the equation 16 and a half h = 132 to find h, the headbands Brinely can make.
Answers
Answer:
8 headbands can be made.
Step-by-step explanation:
dividing both sides by 16.5, the material needed for one, leaves the equation as h=8, because 132 divided by 16.5 equals 8
Brinley can make 8 hands from the elastic she has.
What is the unitary method?
The unitary method is a method in which you find the value of a unit and then the value of a required number of units. Suppose you go to the market to purchase 6 apples. The shopkeeper tells you that he is selling 10 apples for Rs 100. In this case, the apples are the units, and the cost of the apples is the value.
Given here, A headband needs 16 and a half inches of elastic and Brinley has 132 inches of elastic
Therefore the number of headbands that she could make is
= 132/16.5
=8 Headbands.
Hence, Brinley can make 8 hands from the elastic she has.
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2.2.15
Question Help
Number of Children Number of
under 5
Households
To predict future enrollment in a school district, fifty households within
the district were sampled, and asked to disclose the number of
children under the age of five living in the household. The results of
the survey are presented in the table. Complete parts (a) through (c)
below
(a) Construct a relative frequency distribution of the data.
Number of Relative
Children under 5 Frequency
0.34
0.28
0.28
0.06
0.04
(Type integers or decimals. Do not round.)
(b) What percentage of households has two children under the age of 5?
Enter your answer in the answer box and then click Check Answer
Answers
Answer:
Step-by-step explanation:
a)
Number of children under 5 Number of household Relative frequency
0 17 17 / 50 = 0.34
1 14 14 / 50 = 0.28
2 14 14 / 50 = 0.28
3 3 3 / 50 = 0.06
4 2 2 / 50 = 0.04
50
Note,
Relative frequency = Class frequency / Total Frequency
b) Percentage of households has two children under the age of 5 ,
= [tex]\frac{14}{50}[/tex] x 100
= 0.28 x 100
= 28%
Final answer:
To calculate the percentage of households with two children under the age of 5, divide the frequency of 2 by the total number of households and multiply by 100.
Explanation:
To calculate the percentage of households with two children under the age of 5, we need to find the relative frequency of 2 in the given data. The relative frequency is calculated by dividing the frequency of 2 by the total number of households, which is 50 in this case. The frequency of 2 is 0.06, so the relative frequency of 2 is 0.06/50 = 0.0012. To convert it to percentage, we multiply by 100, so the percentage of households with two children under the age of 5 is 0.0012 * 100 = 0.12%.
Amanda wants to attend Baylor University for her 4-year college. She is a National Merit Scholar and scores a 1500 on her SATs. This qualifies her for a yearly scholarship of $44,194. How much additional money does she need to have to attend Baylor for 4 years?
Answers
Answer:
$58,544
Step-by-step explanation:
Given that Baylor charges tuition fees at $41,194, Room at $13038 and Required fees at $4598 p.a. We also know that the scholarship pays $44194 p.a.
#The additional money for the four years is the total minus the scholarship multiplied by 4 yrs:
[tex]C_{p.a}=Tution+Room+Required\\\\=41194+13038+4598\\\\=58830\\\\Scholarship=44194\\\\\bigtriangleup p.a=58830-44194\\\\=14636[/tex]
The additional cost to attend the college for the next four years is:
[tex]\bigtriangleup p.a=14636\\\\\sum{\bigtriangleup p.a _i}=4\times 14636\\\\=58544[/tex]
Hence, Amanda needs an additional $58,544 to attend Baylor for the 4 years.