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Ivahew [28]
3 years ago
7

(HELP ASAP PLEASE)

Mathematics
1 answer:
vlada-n [284]3 years ago
6 0

Answer:

for four copies the cost is $72

Step-by-step explanation:

52 + 5a = 24 + 12a

28 + 5a = 12a

28 = 7a

a = 4

52 + 20 = 72

for four copies the cost is $72

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Please help me solve this correct answer gets brainlist
Karolina [17]
A^2 + b^2 = c^2
9^2 + 2^2 = c^2
81 + 4 = c^2
85 = c^2
take the square root of 82 which equals 9.05538…
if it wants a whole number then 10, but if it wants a decimal, the. 9.6 ft.

if you need more detail lmk :)
6 0
3 years ago
50 POINTS .....................
Alenkinab [10]

The option (C) Mus. Apt. = -22.26 + 0.4925(IQ score) is correct because the value of slope is 0.4925 and y-intercept is -22.26.

<h3>What is the line of best fit?</h3>

A mathematical notion called the line of the best fit connects points spread throughout a graph. It's a type of linear regression that uses scatter data to figure out the best way to define the dots' relationship.

\rm m = \dfrac{n\sum xy-\sum x \sum y}{n\sum x^2 - (\sum x)^2}

\rm c = \dfrac{\sum y -m \sum x}{n}

We have data shown in the picture.

Let's suppose the regression line is:

y = mx + c

Where m is the slope of the regression line and c is the y-intercept of the line.

We can calculate the value of m and c by using the formula.

After calculating, we get:

m = 0.4925

c = -22.26

Mus. Apt. = 0.49253(IQ score) - 22.26

or

Mus. Apt. = -22.26 + 0.4925(IQ score)

Thus, the option (C) Mus. Apt. = -22.26 + 0.4925(IQ score) is correct because the value of slope is 0.4925 and y-intercept is -22.26.

Learn more about the line of best fit here:

brainly.com/question/14279419

#SPJ1

4 0
2 years ago
What is 8.52*10 to the third power in standard notation?
MrRa [10]
AKA: 8.52x10^3=8520
^^Also Known As
6 0
3 years ago
5Y+8 -ly-8-8y-1"<br>Your answer​
gulaghasi [49]

Answer:

-4y-1

Step-by-step explanation:

(5y+-y+-8y)+(8+-8+-1)

-4y-1

7 0
3 years ago
Read 2 more answers
Factor the expression 3x^2-15x
tester [92]
Factor out 3x
Answer: 3x(x - 5)
5 0
3 years ago
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