Question

You can rent time on computers at the local copy center for a a ​$ 7 setup charge and an additional ​$ 3.50 for every 10 minutes. How much time can be rented for ​$ 22?

Answer 1

The answer should round up to 40 minutes. Do it to make sure the answer is 4 which in this case = 40

Explanation:

`22 - 7 / 3.50`

Answer 2

Computer can be rented for 42.85 minutes using $22

Explanation:

Given:

Setup charge = ​$ 7

Additional charge for every 10 minutes = ​$ 3.50

To find:

The time for which the computer can be rented for ​$ 22

Solution:

Let the additional time be x

for additional charge for 10 minutes =3.50

for 1 minute , additional charge =
`(3.50)/(10)`= $0.35

According to the question

setup cahrge + additional charge= $22

`7+(0.35* x)=22`

`(0.35* x)=22-7`

`(0.35* x)=15`

`x=(15)/(035)`

x=42.85