Question

The cellular phone service for a business executive is $35 per month plus $.40 per minute of phone use. For a month in which thr executive 's cellular phone bill was $99.80, how many minutes did the executive use the phone?

Answer 1

35 + 0.40m=99.80
subtract 35 from both sides
0.40m=64.80
divide both sides by 0.40
m=162 minutes.

Answer 2

Thanks taylor