Question

Salma purchased a prepaid phone card for $15 Long distance calls cost 6 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 $13.14 how many minutes did her call last?

Answer 1

m=17

Explanation:

$15 minus $0.14(# minutes) = $12.62

15 - .14m = 12.62

.14m = 15 - 12.62

.14m = 2.38

m = 2.38/.14

m = 17 minutes