Question

A self-serve car wash charges $5.20 to use its facilities, plus an additional $0.53 for each minute the customer is at the self-serve car wash. If Tiffany was at the car wash for 6 minutes, how much was she charged?

Answer 1

$8.39, because $0.53 x 6 equals to $3.18, and $3.18 + $5.20 equals $8.39.

Answer 2

y = 0.53x + 5.20......x = # of minutes

if she was at the car wash for 6 minutes....x = 6
y = 0.53(6) + 5.20
y = 3.18 + 5.20
y = 8.38 <=== she is charged $ 8.38