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3 years ago

5

a painter charges $20 for every hour that he paints. let h represent the number of hours he paints and e represent his earnings.

select all the statements that are true.

1 answer:

Sedbober [7]3 years ago

5 0

One answer could be h times 20 equals e

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A function is given. Determine the average rate of change of the function between the given values of the variable: f(x)= 4x^2;

nevsk [136]

$\bf slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ f(x_2)}}-{{ f(x_1)}}}{{{ x_2}}-{{ x_1}}}\impliedby 
\begin{array}{llll}
average\ rate\\
of\ change
\end{array}\\\\
-------------------------------$

$\bf f(x)= 4x^2 \qquad 
\begin{cases}
x_1=3\\
x_2=3+h
\end{cases}\implies \cfrac{f(3+h)-f(3)}{(3+h)~-~(3)}
\\\\\\
\cfrac{[4(3+h)^2]~~-~~[4(3)^2]}{\underline{3}+h-\underline{3}}\implies \cfrac{4(3^2+6h+h^2)~~-~~4(9)}{h}
\\\\\\
\cfrac{4(9+6h+h^2)~~-~~36}{h}\implies \cfrac{\underline{36}+24h+4h^2~~\underline{-~~36}}{h}
\\\\\\
\cfrac{24h+4h^2}{h}\implies \cfrac{\underline{h}(24+4h)}{\underline{h}}\implies 24+4h$

8 0

2 years ago

Kim has read 42 pages of a book. That is 20% of the total number of pages. How many pages long is Kim's book?

ki77a [65]

Hi there! The answer is 210 pages.

We can find our answer by looking at the proportions:
20 % is 42 pages.
10 % is 21 pages (42 / 2).
100% is 210 pages. (21 × 10).

4 0

2 years ago

Read 2 more answers

5-10/8=<br><br> 3 6/8<br> 4 6/8<br> 3 2/8<br> 6 2/8

Oksi-84 [34.3K]

Answer:

3 6/8

Step-by-step explanation:

5 = 5

10/8 = 1 2/8

5 - 1 = 4

4 - 2/8 = 3 6/8

7 0

2 years ago

Read 2 more answers

Which measurement is the best estimate of the area in square inches of the stove top that does not include the area of the burne

Paraphin [41]

I think D.)576 in.2

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2 years ago

Will mark brainliest

AlekseyPX

E and C. 2:5 and salt:pepper

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2 years ago