Question

Sunny Horizon Cellular’s phone plan has a monthly fee of $10.00 and charges $0.10 for every minute used. Stephan’s bill for the month was $23.80. If the equation that models this situation is (0.10)m + 10.00 = 23.80, use inverse operations and properties of equality to find the number of minutes Stephan talked during the month.

Answer 1

(0.10)m +10.00 = 23.80
0.10m = 13.80
m=13.80/0.10
m = 138 minutes