WILL MARK BRAINLIEST

Which of the following equations is written in the slope-intercept form?


y = -2x + 4


9 + y = m - b


y + 3/2 = m - x


b = 1/5x + y

Answer:

Less than

Step-by-step explanation:

Sample variance is computed by dividing the Sum of Squares (SS) by the number of samples (n).

Population variance is computed by dividing the Sum of Squares (SS) by the difference between the number of samples and 1 (n-1).

After computing, it would be found that the sample variance is less than the population variance.

The average of sample variances, computed by dividing the Sum of Squares by sample size (n) from all possible samples, will be less than the population variance.

If sample variance is computed by dividing Sum of Square (SS) by sample size (n), then the average value of the sample variances from all possible random samples would be biased. In fact, it will be less than the actual population variance. This is commonly known as Bessel's correction in statistics. For an unbiased estimate of the population variance, we should rather divide the SS by degrees of freedom (n-1), not by the sample size n. So, when you average the sample variances, obtained by dividing by n from all possible samples, the result will be less than the population variance.

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Answer:

Probability, P(getting 2 toppings)= 0.1984

Step-by-step explanation:

Probability, P(1 toppings)= 1/7

Probability P of getting a particular topping is q = 1 - P = 1 - 1/7 = 6/7

Probability of( getting 2 toppings)= 7!/(2!5!)(1/7)^2 × (6/7)^5

P(getting 2 toopings)= (5040/240) × (0.020)× (0.4627)

P(getting 2 toppings)= 21 × 0.00948 = 0.1984

Answer:

Cost of 3 bottles will be $7.5.

Step-by-step explanation:

Given:

According to double number line.

Cost of 4 bottles = $10

Based on this we need to find the cost of 3 bottles of water.

Solution:

Now we know that;

4 bottles = $10

1 bottle = Cost of 1 bottle

By using Unitary method we get;

Cost of 1 bottle = [tex]\frac{10}{4}=\$2.5[/tex]

So we can say that;

Cost of n bottles = [tex]\$2.5n[/tex]

Cost of 3 bottles = [tex]\$2.5\times 3 = \$7.5[/tex]

Hence Cost of 3 bottles will be $7.5.

Now we have drawn the double number line.

Bottom line(Line 1)  will be number of bottles:  

1   2   3   4   5   6  

Top line (Line 2) will be the cost of corresponding bottles:

2.5  5  7.5  10  12.5  15

Answer:

$7.5 Dollars

Step-by-step explanation:

The cost of 4 bottles is $10. So, 1 bottle is going to be $2.50.

Now, to find the cost of 3 water-bottles, we have to multiply.

$2.50 * 3 = $7.50.

So, the answer to this question is  3 bottles = $7.50

(Hope this helps!)

Answer:

organizational

Step-by-step explanation:

organizational encoding iis process of categorizing information according to. the relationships among a series of items. Here the categorizing information are hearts, clubs, diamonds, and spades.

Hope it will find you well.

Moshe is using categorical encoding to group the cards that have already been played by suit

Moshe is using categorical encoding to group the cards that have already been played by suit. Categorical encoding is a type of semantic encoding, where information is organized and stored based on categories or groups. In this case, Moshe is categorizing the cards into the four suits: hearts, clubs, diamonds, and spades.

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Answer:

Step-by-step explanation:

False.  Asymptotes are the walls that the function can't get over.  This wall has no gaps or holes, nor does it have a gate.  The function has to stay on one side of the asymptote in order for it to be a legit asymptote.  Since our function is both above and below the dotted line, the dotted line is not an asymptote.

Answer:

1350

Step-by-step explanation:

Initially 90 squirrels were tagged out of a total population of x squirrels.

Similarly, 42 squirrels out of a sample of 630 squirrels had tag

We can use ratio equality to find the total population x.

42:90=620:x

[tex]\frac{42}{90} =\frac{630}{x}[/tex]

Cross multiplying

42 X x = 630 X 90

Dividing both sides by 42

[tex]x=\frac{630 X 90}{42} \\=1350[/tex]

The total number of squirrels in the city park is 1350.

The total number of squirrels in the park is approximately 1350.

To estimate the total squirrel population in the park, we can use the Lincoln-Petersen method, which is a mark-recapture technique. The formula for this method is:

[tex]\[ N = \frac{(M \times n)}{m} \][/tex]

Given the data:

- ( M = 90 ) (the number of tagged squirrels),

- ( n = 630 ) (the total number of squirrels counted in the second sample),

- ( m = 42 ) (the number of tagged squirrels found in the second sample).

Plugging these values into the formula, we get:

[tex]\[ N = \frac{(90 \times 630)}{42} \] \[ N = \frac{56700}{42} \] \[ N = 1350 \][/tex]

Therefore, the total number of squirrels in the park is estimated to be 1350.

Answer:

t=11 sec

Step-by-step explanation:

The position of the particle moving along the x-axis is given by:

[tex]s(t) = {t}^{3} - 18 {t}^{2} + 33t + 14[/tex]

The velocity is given by:

[tex]s'(t) = 3 {t}^{2} - 36{t} + 33[/tex]

If s'(t)>0 then the particle is moving right.

[tex]3 {t}^{2} - 36{t} + 33 \: > \: 0 \\ {t}^{2} - 12{t} + 11\: > \: 0[/tex]

[tex] \implies \: t \: < \: 1 \: or \: t \: > \: 11[/tex]

This means that the particle is moving left when

[tex]1 \: < \: t \: < \: 11[/tex]

The particle changes direction at time t=1 or t=11

Answer:

A and D

Step-by-step explanation:

We are given that

(3/4,2/3),(1/4,1),(1,1/2) and (1/2,1)

[tex]x_1=\frac{3}{4}[/tex]

[tex]y_1=\frac{2}{3}[/tex]

[tex]x_2=\frac{1}{4},y_2=1[/tex]

[tex]x_3=1,y_3=\frac{1}{2}[/tex]

[tex]x_4=\frac{1}{2},y_4=1[/tex]

k=[tex]\frac{1}{2}[/tex]

Direct proportion:

[tex]\frac{x}{y}=k[/tex]

Inverse proportion:[tex]xy=k[/tex]

[tex]\frac{x_1}{y_1}=\frac{3}{4}\times \frac{3}{2}=\frac{9}{8}\neq \frac{1}{2}[/tex]

Therefore, it is not in direct proportion.

[tex]\frac{1}{4\times 2}=\frac{1}{8}\neq\frac{1}{2}[/tex]

[tex]\frac{1}{\frac{1}{2}}=2\neq \frac{1}{2}[/tex]

[tex]x_1y_1=\frac{3}{4}\times \frac{2}{3}=\frac{1}{2}[/tex]

[tex]x_2y_2=\frac{1}{4}\times 2=\frac{1}{2}[/tex]

[tex]x_3y_3=1\times \frac{1}{2}=\frac{1}{2}[/tex]

[tex]x_4y_4=\frac{1}{2}\times 1=\frac{1}{2}[/tex]

Therefore, [tex]xy=k=\frac{1}{2}[/tex]

Hence, the given points form an inverse variation .

[tex]xy=\frac{1}{2}[/tex]

[tex]y=\frac{1}{2x}[/tex]

Option A and D is true.

Answer: A and D

Step-by-step explanation:

Cause edg2020

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.

Coefficient of [tex]x^2y^2[/tex] = 24

Solution:

Given that:

[tex](2x - y)^4[/tex]

We have to find the coefficient of [tex]x^2y^2[/tex] term

Use the following algebraic formula

[tex](a-b)^4 = a^4 - 4a^3b+6a^2b^2-4ab^3+b^4[/tex]

From given,

[tex](2x - y)^4[/tex]

Where,

a = 2x

b = y

Therefore, by using formula, we get,

[tex](2x - y)^4 = (2x)^4 - 4(2x)^3(y) + 6(2x)^2(y)^2 - 4(2x)(y)^3 + y^4\\\\Simplify\\\\(2x - y)^4 = 16x^4 - 32x^3y + 24x^2y^2-8xy^3 + y^4[/tex]

Find the coefficient of [tex]x^2y^2[/tex]

From above simplified expression,

coefficient of [tex]x^2y^2[/tex] = 24

Answer:

24

Step-by-step explanation:

Answer:

72

Step-by-step explanation:

3 x 4 = 12

12 x 6 = 72

hope i helped

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)!

Answer: you bought 7 bottles of orange juice and 8 bottles of apple juice.

Step-by-step explanation:

Let x represent the number of 1-gallon bottles of orange juice that you bought.

Let y represent the number of 1-gallon bottles of apple juice that you bought.

You bought 15 1 gallon bottles of orange juice and apple juice for school breakfast. This means that

x + y = 15

The apple juice was on sale for $1.50 per gallon bottle. The orange juice was two dollars per gallon bottle. You spent $26. This means that

2x + 1.5y = 26 - - - - - - - - - - - - -1

Substituting x = 15 - y into equation 1, it becomes

2(15 - y) + 1.5y = 26

30 - 2y + 1.5y = 26

- 2y + 1.5y = 26 - 30

- 0.5y = - 4

y = - 4/ - 0.5

y = 8

x = 15 - y = 15 - 8

x = 7

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.

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.

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.

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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Answer:

Therefore the required polynomial is

M(x)=0.83(x³+4x²+16x+64)

Step-by-step explanation:

Given that M is a polynomial of degree 3.

So, it has three zeros.

Let the polynomial be

M(x) =a(x-p)(x-q)(x-r)

The two zeros of the polynomial are -4 and 4i.

Since 4i is a complex number. Then the conjugate of 4i is also a zero of the polynomial i.e -4i.

Then,

M(x)= a{x-(-4)}(x-4i){x-(-4i)}

      =a(x+4)(x-4i)(x+4i)

      =a(x+4){x²-(4i)²}      [ applying the formula (a+b)(a-b)=a²-b²]

      =a(x+4)(x²-16i²)

      =a(x+4)(x²+16)      [∵i² = -1]

      =a(x³+4x²+16x+64)

Again given that M(0)= 53.12 . Putting x=0 in the polynomial

53.12 =a(0+4.0+16.0+64)

[tex]\Rightarrow a = \frac{53.12}{64}[/tex]

      =0.83

Therefore the required polynomial is

M(x)=0.83(x³+4x²+16x+64)

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

To find the number of virus particles after 3 days, substitute x=3 into the given polynomial. The number of virus particles, in billions, after 3 days is approximately 48.37 billion.

To find the number of virus particles after 3 days, substitute x=3 into the polynomial:

y = -0.73(3)^4 + 3.1(3)^3 + 26.5

Calculating this expression:

y = -0.73(81) + 3.1(27) + 26.5 = -59.13 + 81 + 26.5 = 48.37

Therefore, the number of virus particles, in billions, after 3 days is approximately 48.37 billion.

Answer:

Subtract the maximum and minimum values.

Step-by-step explanation:

The range of a data set is the interval that contains all values in the set and is determined as the difference between the maximum and the minimum values within the data set. Therefore, in order to find the range of a set of data, simply subtract the maximum and minimum values.

Answer:

Subtract the maximum and minimum values.

Step-by-step explanation:

The area of the given rectangle is of the standard form option 1.[tex]2x^{2} + 3x - 20[/tex].

Step-by-step explanation:

Step 1:

The parameters needed to determine the area of a rectangle are the base length and the width.

The base length of this rectangle is [tex]2x-5[/tex] units while its width is [tex]x+4[/tex] units.

The area of a rectangle is determined by multiplying the base length with the width.

Step 2:

The area of the rectangle [tex]= (length)(width).[/tex]

Here length is [tex]2x-5[/tex] units and the width is [tex]x+4[/tex] units.

The area of the rectangle[tex]= (2x-5)(x+4) = 2x^{2} + 8x -5x-20 = 2x^{2} + 3x - 20.[/tex]

So the area of the given rectangle is of the standard form [tex]2x^{2} + 3x - 20[/tex] which is the first option.

To find the area of the rectangle, we need to multiply the expressions for the lengths of its sides. The sides are given as [tex]\(2x - 2\) and \(x + 4\).[/tex]

First, write the expressions for the sides of the rectangle:

- One side is[tex]\(2x - 2\)[/tex]

- The other side is[tex]\(x + 4\)[/tex]

To find the area, multiply these two expressions:

[tex]\[(2x - 2)(x + 4)\][/tex]

Use the distributive property (also known as the FOIL method for binomials) to expand this product:

[tex]\[(2x - 2)(x + 4) = 2x(x) + 2x(4) - 2(x) - 2(4)\][/tex]

Simplify each term:

[tex]\[= 2x^2 + 8x - 2x - 8\][/tex]

Combine like terms:

[tex]\[= 2x^2 + 6x - 8\][/tex]

So, the polynomial expression in standard form representing the area of the rectangle is:

[tex]\[2x^2 + 6x - 8\][/tex]

Given the options:

- 2x^2 + 3x − 20

- 2x^2 + 13x − 1

- 2x^2 + 13x − 20

- 2x^2 + 3x − 1

None of these options exactly match our result of [tex]\(2x^2 + 6x - 8\),[/tex] indicating a potential error in the problem statement or options provided. The correct simplified polynomial expression for the area, based on the given side lengths, is[tex]\(2x^2 + 6x - 8\).[/tex]

Answer:

198,400,000

Step-by-step explanation:

Total Approximate Number of Residents in the United States = 320 million

38 per cent of the total number of residents live in the South

That means, as a percentage, 100%-38%=62% live in other areas of the Unjted States.

[tex]62 \% of 320 million[/tex] = [tex]\frac{62}{100}X320000000[/tex]=198,400,000.

Therefore a total of about 198,400,000 live in other areas of the United States.

Answer: the total square footage is

850 ft³

Step-by-step explanation:

The kitchen is 10 feet by 15 feet. This means that the volume of the kitchen would be

10 × 15 = 150 ft³

The living/dining combo is 20 feet by 25 feet. This means that the volume of the living/dining combo would be

20 × 25 = 500 ft³

The office and sunroom are each 10 feet by 10 feet. This means that the volume of the office would be

10 × 10 = 100 ft³

Also, the volume of the sunroom would be

10 × 10 = 100 ft³

Therefore, the total square footage is

150 + 500 + 100 + 100 = 850 ft³

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]

Answer:

The answer to your question is 1.59 km

Step-by-step explanation:

Data

Sign 54 km or 34 mi

1 mi = ? km

Process

1.- Use proportions and cross multiplication to find the answer

               54 km ----------------- 34 mi

                 x   km ----------------    1 mi

                 x = (1 mi x 54 km) / 34 mi

-Simplification

                 x = 54 km / 34

-Result

                x = 1.59 km

2.- Conclusion

1 mile is equivalent to 1.59 km

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.

Answer:

At most 2 adult haircuts

Step-by-step explanation:

The equation given is:

[tex]0.75C+1.25A \leq 70[/tex]

This equation dictates the number of haircuts Horace gives in 7 hours.

Horace gave 5 child haircuts (C=5). So, that would make the equation:

[tex]0.75C+1.25A \leq 7\\0.75(5)+1.25A \leq 7\\3.75+1.25A \leq 7\\1.25A \leq 7 - 3.75\\1.25A \leq 3.25\\A \leq \frac{3.25}{1.25}\\A \leq 2.6[/tex]

This means Horace can give LESS THAN or EQUAL to 2.6 haircuts.

2.6 haircuts doesn't make sense, so the maximum would be "2" haircuts.

Atmost 2 adult haircuts

Answer: It is C because if you organize the equation numerically the equation is 18x^3+30x^2+12x+10. So it is 18.

Answer:

  5

Step-by-step explanation:

Very early in your study of multiplication tables, you learned that ...

  5 × 2 = 10

Cathy must fill the 2-cup jar 5 times to transfer a total of 10 cups.

Final answer:

To fill a 10-cup bucket using a 2-cup jar, Cathy must scoop water from the pond 5 times, as 10 divided by 2 equals 5.

Explanation:

The question is how many times Cathy needs to scoop water from the pond with a 2-cup jar to fill her 10-cup bucket.

To find the answer, we simply divide the total capacity of the bucket by the capacity of the jar. So, the calculation would be:

Calculate the total number of cups needed: 10 cups (capacity of the bucket).

Calculate the number of cups per scoop: 2 cups (capacity of the jar).

Divide the total number of cups by the number of cups per scoop: 10 cups/ 2 cups per scoop

= 5 scoops.

Cathy needs to scoop water from the pond 5 times to fill her 10-cup bucket.

Answer:

The correct answer to the question is

4. How likely is it that, in a sample of 45, the true mean amount of time needed to find a parking spot is less than 20 minutes?

Step-by-step explanation:

Confidence interval provides a range of likely values for an unknown parameter. The interval is weighted based on probabilities of occurrence, such as 95% or 99% based on the result of a sample of test data.

It gives the probability that a given parameter such as the mean will be of a certain value range based on a given number of times.

As such the confidence level of the given mean amount of time needed to find a parking spot should be known.

Answer:

The amount Declan saves from the discount is 15% of $35,000

which is $5250

This Amount $5250 is the amount Declan invests in the bank

This is the Amount the bank pays at the end of the time T of saving

Step-by-step explanation:

The simple Interest is calculated by

I = (P x R x T) / 100

where I is the Interest

R  is the rate in percentage

T  is the time the money will be saved

Another Important quantity is the Amount A

A = I + P