Question

A painter charges $20 for every hour that he paints. Let h equal the number of hours he paints and e represent his earnings.Select TWO equations that represent the situation.A. e= 20hB. h=20+eC. 20=h+eD. 20=hxeE. e/h=20

Answer 1

The form of the linear equation is

`y=mx+b`

m is the rate of change

b is the initial amount

Since The painter charges $20 every hour, then

The rate is 20

m = 20

Since there is no initial amount of payment, then

b = 0

Since the number of hours is h, then

x = h

Since the earning is e, then

y = e

The equation is

`e=20h`

Then the first equation is A

Divide both sides by h

`\begin{gathered} (e)/(h)=(20h)/(h) \\ (e)/(h)=20 \end{gathered}`

The 2nd equation is E