Question

A cell phone company has a basic monthly plan of $40 plus $0.45 for any minutes used over 700.Before receiving his statement,John saw he was charged a total of $48.10.Write and solve an equation to determine how many minutes he must have used during the month.Write an equation without decimals

Answer 1

0.45M+40

The M stands for the amount of minutes he went over.

Answer 2

40 + 0.45m = 48.10
400 + 4.5m = 481
4000 + 45m = 4810

45m = 810
m = 18

John used 18 minutes over 700 for the month. He used a total of 718 minutes.