Answer:
2 thirds of the trails are longer than 5 Km
Step-by-step explanation:
A line plot that forms a straight line indicates a direct relationship between the two variables plotted. A graph that shows less deviation from the line of best fit is a good candidate for linear regression. Line graphs are typically used to show trends over time.
Explanation:When considering a line plot or any graphical representation of data such as scatter plots or line graphs, the main goal is to uncover the underlying pattern or relationship presented. If the data, when graphed, forms a straight line, it suggests a direct relationship between the variables involved. This implies that as one variable increases, the other variable either increases or decreases by a consistent rate. For instance, if one plot shows a line from (0,8) to (3,2), there's a decrease as the first variable increases. Conversely, a line from (0,2) to (3,2) or from (0,3) to (3,3) suggests no change, indicating a directly horizontal line and therefore no relationship. When determining good candidates for linear regression, a scattering of points closely aligned in a straight line pattern, with little deviation from the line of best fit, is indicative of such. Linear regression is more accurate when the variance around the line of best fit is minimal, as seen in the second graph described. Line graphs specifically are useful for showing data trends over time, where the x-axis typically represents time and the y-axis represents another variable.
Which of the following Expressions is not equivalent to -8? a. 2×(-4) b. 4×(-2) c. -4×2 d. -4×(-2)
D
Negative times negative is positive
The product of a number m and 6 is no less than 30.
Answer:
x= anything less than 5
Step-by-step explanation:
We know that 5*6 is 30, so x would have to be anything less than five.
Answer:m+6<30
Step-by-step explanation:
Distance to the earth's center kilometer
Answer:
its 6,371 in kilometers
Please this is very urgent!!!!!
39 degrees
51 degrees
129 degrees
180 degrees
Please help!!!
Whats the square root of 4?
Answer:
2
Step-by-step explanation:
Answer: 2
Step-by-step explanation: The square root of 4 is 2.
4 is a perfect square which means that a whole number which in this case is 2 can be multiplied by itself to give us 4.
It's also on our perfect square list which I have attached below.
please help me...... I need help
First, let us find out how many miles the hikers travel per day.
They walk at a rate of two mph for eight hours each day which means that they travel 16 miles per day (8x2).
Because the total distance of the great wall is 3948 miles to find out the amount of time needed...
3948/16 = 246.75 days (which is greater than 3 months)
answer: They can't cover the entire distance in three months.
How much is 1+1x3x6+2x20-100/3x20
Answer:
-41/60
Step-by-step explanation:
Type the whole thing into a calculator.
Answer:
The answer is -41/60
Step-by-step explanation:
Eighteen less than the quotient of twelve and a number
Eighteen less than the quotient of twelve and a number is written as:
[tex]\frac{12}{x} - 18[/tex]
Solution:
Given statement is:
Eighteen less than the quotient of twelve and a number
We have to translate the given sentence into algebraic expression
Let "x" be the number
Therefore,
Eighteen less than the quotient of twelve and "x"
Quotient means result of division
Therefore,
[tex]\frac{12}{x} - 18[/tex]
Which means, 18 less than quotient of 12 and x
Thus the given sentence is translated into algebraic expression
The phrase 'eighteen less than the quotient of twelve and a number' is mathematically expressed as 12/n - 18, where n represents the unknown number.
The expression 'eighteen less than the quotient of twelve and a number' translates to a mathematical operation. First, we find the quotient of twelve and a number, which is the result of dividing twelve by that number (let's call it n). Then, we subtract eighteen from that quotient. The algebraic representation of this expression is 12/n - 18.
It's important to follow mathematical rules and order of operations correctly when performing such calculations, similarly to how the rules of arithmetic must be applied correctly regardless of the context, as is described in the example of counting goats or students. Mathematics provides various methods to arrive at the correct answer, and in this case, simplifying the operation is straightforward. It is a demonstration of understanding the correct usage of mathematical operations as well as number fluency.
Square root of 5 •-4 Square root of 20x
Answer:
[tex] - 40 \sqrt{x} [/tex]
Step-by-step explanation:
We want to simplify:
[tex] \sqrt{5} \times - 4 \sqrt{20x} [/tex]
We rewrite the radicand using prime factorization:
[tex] \sqrt{5} \times - 4 \sqrt{4 \times 5x} [/tex]
This gives us
[tex]\sqrt{5} \times - 4 \sqrt{4} \times \sqrt{5} \times \sqrt{x} [/tex]
Create perfect squares and simplify:
[tex](\sqrt{5} )^{2} \times - 4 \sqrt{4} \times \sqrt{x} [/tex]
[tex]5 \times - 4(2) \sqrt{x} [/tex]
[tex]5 \times - 8 \sqrt{x} = - 40 \sqrt{x} [/tex]
Savannah says that 1 kilogram is equivalent to 1000000 milligrams is savannah correct? Explain
Answer:
Savannah is correct
Step-by-step explanation:
Help ASAP!!! 3/8 of the seventh grade students were taking Advanced math at the beginning of the year, but Seven dropped out by the end of the year. If there were 140 students taking advanced math at the end of the year, how many total seventh grade students are there?
Answer:
There are 392 students in the seventh grade.
Step-by-step explanation:
Let us assume that there are x number of students in the seventh grade.
Now, 3/8 of the seventh grade students were taking Advanced math at the beginning of the year, but seven dropped out by the end of the year.
So, after the end of the year there were [tex](\frac{3}{8}x - 7)[/tex] number of students taking advanced math.
So, as per given condition, [tex](\frac{3}{8}x - 7) = 140[/tex]
⇒ [tex]\frac{3}{8}x = 147[/tex]
⇒ x = 392
Therefore, there are 392 students in the seventh grade. (Answer)
Conditional Probability
Yo sup??
P(A|B)=P(A∩B)/P(B)
P(A∩B)=probability of finding a girl and is sophomore
P(B)=probability of finding a sophomore
P(A|B)=9/10
Hope this helps.
Answer:
Step-by-step explanation:
Total number of persons = 37
Number of girl and sophomore= 9
Prob(girl/sophomore) = 9/37
[30points] What is the formula used to make an equation when we know the zeroes (alpha+beta) and (alpha x beta) ?
Answer:
If it is a quadratic equation then it's zeroes are alpha and beta. Sum of zeroes is -b/a. So alpha plus beta is -b divided by a.
Step-by-step explanation:
The formula used for making an equation when you know the zeroes is;
k(x² - (sum of zeroes)x + (product of zeroes)k(x² - (α+β)x + (αβ))k here,is a constant; for better clarification follow this example;
Say
(α+β) = 1(αβ) = 2According to the formula the equation must be;
k(x² - (α+β)x + (αβ))k(x² - (1)x + (2))k(x² - 1x + 2)Now, the k can be replaced with any variable, i.e, 3,4,5/6,7 etc anything. Hope it was clear.
Solve 6 - x - x = 18
[tex]\text{Hey there!}[/tex]
[tex]\mathsf{Solve: 6 -x- x=18}[/tex]
[tex]\mathsf{Combine\ your\ like\ terms}\\\mathsf{6 -\bf{x - x}\mathsf{= 18}}\\\mathsf{-x-x=-2x}\\\mathsf{Your\ new\ equation: -2x+6=18}\\\\\mathsf{Do\ the\ OPPOSITE\ symbol\ on\ both\ sides\ of\ the\ equation}\\\mathsf{Addition\ opposite\ symbol\ is\ subtraction}\\\mathsf{Subtract\ by\ 6\ on\ your\ sides}\\\mathsf{-2x+6-6=18-6}\\\mathsf{Cancel\ out{6-6\ because\ it\ gives\ us\ 0}}\\\mathsf{Keep:18-6\ because\ it\ helps\ us\solve\ for\ the\ answer}\\\\\mathsf{Next,\ divide\ both\ sides\ by\ -2}[/tex]
[tex]\mathsf{\dfrac{-2x}{-2}=\dfrac{12}{-2}}\\\\\mathsf{Cancel\ out: \dfrac{-2x}{-2}\ because\ it\ gives\ you\ the\ result\ of 1}\\\\\mathsf{Keep:\dfrac{12}{-2}\ because\ it\ gives\ the\ answer\ of\ x}\\\\\\\boxed{\bf{Answer:\mathsf{x=-6}}}}}}}\checkmark[/tex]
[tex]\text{Good luck on your assignment and enjoy your day!}\\\\\frak{LoveYourselfFirst:)}[/tex]
If an asset declines in value from $5,000 to $4,100 over 9 years, what is the mean annual growth rate in the asset’s value over these 9 years? Enter your answer as a percentage. If needed, round your answer to 2 digit decimals.
Answer:
2.4 %
Step-by-step explanation:
annual growth is the changes in the value of asset
STEP 1: annual growth rate
= (current value - old value)/old value
= (4100 - 5000)/ 4100
= -0.2195 // 21.95%
Step 2: Mean of x
mean of x= average of x
= total of x / count of x ( x here is the annual growth rate)
= annual growth rate / no of years
= -0.2195/ 9
= -0.02 // 2.4 %
Which expression is equivalent to (x - 2)(x + 4) ?
(x + 1)2 – 9
(x - 1)² – 9
(x + 1)² – 7
(x - 1)² – 7
Answer:
Step-by-step explanation:
hello :
(x + 1)2 – 9 is equivalent to (x - 2)(x + 4)
because (x + 1)2 – 9 =(x + 1)2 – 3²
= (x+1-3)(x+1+3) =(x-2)(x+4)
Answer:
(x + 1)² - 9
Step-by-step explanation:
Expand each of the factors using FOIL
(x - 2)(x + 4)
= x² + 4x - 2x - 8 ← collect like terms
= x² + 2x - 8
Now consider the expansions of
(x + 1)² - 9
= x² + 2x + 1 - 9
= x² + 2x - 8 ← equivalent to (x - 2)(x + 4)
--------------------------------------------------------------
(x - 1)² - 9
= x² - 2x + 1 - 9
= x² - 2x - 8 ← not equivalent to (x - 2)(x + 4)
-----------------------------------------------------------------
(x + 1)² - 7
= x² + 2x + 1 - 7
= x² + 2x - 6 ← not equivalent to (x - 2)(x + 4)
--------------------------------------------------------------------
(x - 1)² - 7
= x² - 2x + 1 - 7
= x² - 2x - 6 ← not equivalent to (x - 2)(x + 4)
Tell whether the statement is true or false. If A is 45% of B, then the ratio A:B is 9:20.
Answer:
True
Step-by-step explanation:
A ratio is a numerical comparison broken down to its most simplest form. Theoretically, a ratio can be the same as a percentage.
45% is the same as 45/100. It can be simplified by dividing 5 from it to get 9/20...
which is the same as the 9:20 ratio.
Hope this helps!
Hope this
Final answer:
The statement is true; A being 45% of B is the same as the ratio A:B being 9:20, since 45% can be expressed as the fraction 9/20.
Explanation:
The statement that if A is 45% of B, then the ratio A:B is 9:20 is true. To understand this, we consider that 45% can be written as a fraction, which is 45/100 or simplified to 9/20.
Using the definition of percentage as a ratio that compares numbers with a denominator of 100, we can translate 45% into a fraction or ratio. This makes A/B = 9/20. Hence, expressing A as a percentage of B (A is 45% of B) is the same as writing the ratio of A to B as 9 to 20.
A practical example can illustrate this further. If B were $100, then 45% of $100 is $45, meaning A would be $45. Thus, A:B would be $45:$100, which simplifies down to 9:20 when considering their fractional equivalents.
The length of CD is 12 units C’D’ is the image of CD under a dilation with a scale factor of n.Which of these are true?
Answer: FIrst option, Fourth option and Fifth option.
Step-by-step explanation:
First it is important to know the definition of "Dilation".
A Dilation is defined as a transformation in which the Image (which is the figure obtained after the transformation) and the Pre-Image (this is the original figure, before the transformations) have the same shape, but their sizes are different.
If the length of CD is dilated with a scale factor of "n" and it is centered at the origin, the length C'D' will be:
[tex]C'D'=nCD=(n)(12\ units)[/tex]
Therefore, knowing this, you can determine that:
1. If [tex]n=\frac{3}{2}[/tex] , you get:
[tex]C'D'=(\frac{3}{2})(12\ units)=18\ units[/tex]
2. If [tex]n=4[/tex], then the length of C'D' is:
[tex]C'D'=(4)(12\ units)=48\ units[/tex]
3. If [tex]n=8[/tex], then:
[tex]C'D'=(8)(12\ units)=96\ units[/tex]
4. If [tex]n=2[/tex], then, you get that the lenght of C'D' is:
[tex]C'D'=(2)(12\ units)=24\ units[/tex]
5. If [tex]n=\frac{3}{4}[/tex], the length of C'D' is the following:
[tex]C'D'=(\frac{3}{4})(12\ units)=9\ units[/tex]
Write 2 numbers that cannot be divided evenly by 8 or 9. Write 1 number that can be divided evenly by both 8 and 9.
Answer:
17 and 26 (cannot be divided evenly by 8 and 9)
72 (LCM for 8 and 9)
Step-by-step explanation:
The value of 2 numbers that cannot be divided evenly by 8 or 9 are 17 and 19.
And, The value of 1 number that can be divided evenly by both 8 and 9 is 72.
What is an expression?Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Now,
The value of 2 numbers that cannot be divided evenly by 8 or 9 are,
⇒ 17 and 19
Cleary. Both number cannot divide by 8 or 9.
And, The value of 1 number that can be divided evenly by both 8 and 9 is,
⇒ LCM of {8, 9}
⇒ 72
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SOMEONE PLEASE HELP ME PLEASE
Answer
23. 180
24. congruent
25. transversal line
Solve for v: -4(v - 2) + 3 > -3(v + 9)
Answer:
-4v + 8 > -3v - 9
-v + 8 > -9
-v > -17
v < 17
Answer:
vhgxyghfjugcfydcf
Step-by-step explanation:
19.4mm what the lower bound correct to 1dp
Answer:
The lower bound of 19.4 is 19.35
Suppose that 21 inches of wire costs 63 cents. At the same rate, how much (in cents) will 14 inches of wire costs?
See picture for solution and answer.
Explain the error in the work shown. Find the
correct answer.
1/64 = 16^2a 4^-3=(2^4)^2a 4^-3=2^8a -3=8a
-3/8 = a
Answer:
[tex]a = - \frac{3}{4}[/tex]
Step-by-step explanation:
The correct solution of the given equation is as follows :
We have,
[tex]\frac{1}{64} = 16^{2a}[/tex]
⇒ [tex]4^{- 3} = (2^{4} )^{2a}[/tex]
⇒ [tex]2^{(2 \times (-3))} = 2^{8a}[/tex]
⇒ [tex]2^{- 6} = 2^{8a}[/tex]
Comparing the power of equal base, we get
- 6 = 8a
⇒ [tex]a = - \frac{6}{8}[/tex]
⇒ [tex]a = - \frac{3}{4}[/tex]
Therefore, before equating the powers of two terms the base of the terms should be equal and here this is the error. (Answer)
Answer:
The bases were not the same when the exponents were set equal to each other.
16 should have been written as 4 squared.
The exponent on the right should be 4a instead of 8a.
The correct solution is a = -3/4
Step-by-step explanation:
correct on edge
A small business earns a profit of $6500 in January and $17,500 in May. What is the rate of change in profit for this time period?
The rate of change in profit for this time period is $1$$ per month.
Rate of change of profit for this period is $2750 per month
Solution:
Given that,
Profit of $6500 in January and $17,500 in May
To find: Rate of change
Since,
January is the first month of the year (1) while May is the fifth month (5)
Therefore, we get two points
(1, 6500) and (5, 17500)
Using these points we can find the rate of change in profit for this time period
The rate of change using the following formula:
[tex]m = \frac{y_2-y_1}{x_2-x_1}[/tex]
Here from the points,
[tex](x_1, y_1) = (1, 6500)\\\\(x_2, y_2) = (5, 17500)[/tex]
Therefore, rate of change is given as:
[tex]m = \frac{17500-6500}{5-1}\\\\m = \frac{11000}{4}\\\\m = 2750[/tex]
Thus rate of change of profit for this period = $2750 per month
what is the mean,mode,median,and range of 5,5,5,6,6,6,7,7,7,7,7
Answer:
median=6, range=2 mean=61 mode=7
the median is the middle which is 6
The range is the lowest-biggest number which would be 2
mean=average
mode is the one that appears most
Answer:
68 / 11 = mean
7 = mode
6 = median
2 = range
Step-by-step explanation:
Mean means the average
Mode means the most common
Median means the middle
Step 1: Find the mean by adding all the values then dividing by the amount of values
5 + 5 + 5 + 6 + 6 + 6 + 7 + 7 + 7 + 7 + 7 = 68
68 / 11 = mean
Step 2: Find the mode which is the most common
5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 7
5 is repeated 3 times, 6 is repeated 3 times, 7 is repeated 5 times
7 = mode
Step 3: Find the median which is the middle
5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 7
6 = median because it is in the middle
Step 4: Find the range which is the difference the highest and lowest number
7 - 5 = 2
2 = Range
How do you Solve 9k+m=6p for k
Answer:
k=[tex]\frac{2p-m}{3}[/tex]
Step-by-step explanation:
9k+m=6p
9k=6p-m
k= [tex]\frac{6p-m}{9}[/tex]
k= [tex]\frac{2p-m}{3}[/tex]
Marcus and Phillip are in the Robotics Club. They are both saving money to buy materials to build a new robot. They plan to save the same amount of money.
Marcus decides to open a new bank account. He deposits $25 that he won in a robotics competition. He also plans on depositing $15 each week that he earns from
tutoring. Phillip also opens an account. He deposits $40 he has saved from mowing lawns over the summer. He plans to save $10 a week from his allowance. After
how many weeks will they have the same amount of money saved?
3 weeks
4 weeks
5 weeks
6 weeks
Answer:
Step-by-step explanation:
marcus : deposits 25 + 15 each week(w)
25 + 15w
Philip : deposits 40 + 10 each week(w)
40 + 10w
when will they be equal.....set them equal and solve for w, the number of weeks
25 + 15w = 40 + 10w
15w - 10w = 40 - 25
5w = 15
w = 15/5
w = 3 <==== they will be equal at 3 weeks
The number of weeks for both Marcus and Phillip to have the same amount of money saved is 3 weeks
What is an Equation?
Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
It demonstrates the equality of the relationship between the expressions printed on the left and right sides.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given data ,
Let the number of weeks be = A
The amount Marcus deposits in the bank account = $25
The amount Marcus deposits each week = $15
So ,
After A weeks , Marcus will deposit = $ 15A
And , Total deposit in the bank for Marcus =
Amount Marcus deposits in the bank account + Amount Marcus deposits for A weeks
Total deposit in the bank for Marcus = 25 + 15A
And ,
The amount Phillip deposits in the bank account = $40
The amount Phillip deposits each week = $10
So ,
After A weeks , Phillip will deposit = $ 10A
And , Total deposit in the bank for Phillip =
Amount Phillip deposits in the bank account + Amount Phillip deposits for A weeks
Total deposit in the bank for Phillip = 40 + 10A
Now , for both Marcus and Phillip to have the same amount after A weeks ,
Total deposit in the bank for Marcus = Total deposit in the bank for Phillip
Substituting the values , we get
25 + 15A = 40 + 10A
Subtracting 10A on both sides , we get
5A + 25 = 40
Subtracting 25 on both sides , we get
5A = 15
Divide by 5 on both sides , we get
A = 3 weeks
Hence , The number of weeks for both Marcus and Phillip to have the same amount of money saved is 3 weeks
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1. If I have a car that cost 30,000 and every year it loses value at 20% a year, then what would the value of
the car be after 5 years?
Growth
rate
Answer:
$9,830.40
Step-by-step explanation:
1st year--$30,000.00 x .20=$6,000.00= $30,000.00 - $6,000.00 =$24,000.00
2nd year--$24,000.00 x .20=$4 800.00=$24,000.00 -$4,800.00=$19 200.00
3rd year---$19,200.00 x .20 =$3,840.00= $19,200.00 - $3,840.00 = $15,360.00
4th year---$15,360.00 x .20=$3,072.00=$15,360.00 - $3,072.00=$12,288.00
5th year $12,288.00 x .20=$2,457.60=$12,288.00 - $2,457.60 =$9,830.40
19125 people, exactly 75%, what is the total population of the town
Answer:
25500 people
Step-by-step explanation:
We are given;
Number of people is 19125
The percentage representing the number is 75%
We need to determine the total population;
The total population will be 100%
Therefore;
If 75% = 19125 people
Then, 100% will represent;
= (19125 ÷ 75) × 100
= 255 × 100
= 25500 people
Therefore, the total population of the town is 25500 people
Final answer:
To find the total population of the town, divide 19,125 (75% of the population) by 0.75, resulting in a total population of 25,500.
Explanation:
To find the total population of the town when given that 19,125 people represent 75%, we need to use the concept of percentages. The number 19,125 is 75% of the total population, so if we let total population equal 'x', we can set up the equation 0.75x = 19,125. To solve for 'x', we divide both sides of the equation by 0.75.
Therefore, the equation to find the total population is:
x = 19,125 / 0.75
Calculating this gives us:
x = 25,500
So, the total population of the town is 25,500.