Question

Salma purchased a prepaid phone card for $15. Long distance calls cost 17 cents a minute using this card, Salma used her card only once to make a

long distance call. If the remaining credit on her card is $10.92, how many minutes did her call last?
minutes
х
5
?

Answer 1

Explanation: Answer: around 64 minutes

We need to first set the two equal to each other.

We can model the first part using the slope intercept form.

y=.17x+15

We are trying to find the amount of minutes or x she can spend. We solve for x by using inverse operations.

However, the question states that she has already paid the flat fee of 15 dollars, so we are only doing .17x=10.92 (inverse operations for x)

X=64.23 minutes or around that.