A phone company offers two monthly plans.

Question

A phone company offers two monthly plans. Plan A costs 28 plus an additional 0.10 for each minute of calls. Plan B costs 13 plus an additional 0.15 for each minute of calls. For what amount of calling do the two plans cost the same? What is the cost when the two plans cost the same?

Answer 1

28 +.1m = 13 + .15m

.15m- .1m = 28-13

.05m = 15

m=15/.05

m = 300 minutes

Cost = 28+.1(300)

= 28+30 = $58

= 13+.15(300)

= 13+ 45 = $58