Question

You can rent time on computers at the local copy center for a $9 setup charge and an additional $1.50 for every 5 minutes. How much time can be rented for $25?

Answer 1

Step-by-step explanation:

serup charge =$9

total cost paid=$25

remaining per time cost=$25-$9=$16

$1.5 for 5 minutes

$1 for 10/3 minutes

$16 for 160/3 minutes

160/3 minutes= 53 minutes 20 sec

Answer 2

53 minutes and 20 seconds can be rented for $25.

Explanation:

Let x = Number of periods where each period is of 5 minutes.

As per given :

Fixed setup charge = $9

Additional charge for every 5 minutes = $1.50

Total charge on x time periods = (Fixed setup charge)+(Additional charge )(x)

y= 9+1.5x

At y= 25

$25= 9+1.5x\\\\\Rightarrow\ 1.5x=25-9=16\\\\\Rightarrow\ x=\dfrac{16}{1.5}\\\\ x=\dfrac{32}{3}$

Required time =$\dfrac{32}{3}\times5=\dfrac{160}{3}\text{ minutes}$

$=\dfrac{159+1}{3}=53\text{minutes}+\dfrac{1}{3}\times60\text{seconds}$

$=53\text{ minutes and 20 seconds}$

Hence, 53 minutes and 20 seconds can be rented for $25.

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