Question

nicole purchased a prepaid phone card for $50.25. calls cost 10 cents a minute using this card. the credit, c (in dollars), left on the card after it is used for x minutes of calls is given by the following. c = 50.25 - 0.10x. how much credit is left on the card after nicole uses it for 15 minutes of calls?

Explanation:

Step1: Identify the value of x

The number of minutes used $x = 15$.

Step2: Substitute x into the formula

Substitute $x = 15$ into the formula $C=50.25 - 0.10x$. So $C=50.25-0.10\times15$.

Step3: Perform the multiplication

$0.10\times15 = 1.5$.

Step4: Perform the subtraction

$C=50.25 - 1.5=48.75$.

Answer:

$48.75$