A phone company offers two monthly plans. Plan A costs $17 plus an additional $0.09 for each minute of calls. Plan B costs $9 plus an additional $0.11 for each minute of calls.

Question

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

17+ .09m = 9 + .11m

8 = .02m

m = 8/.02= 400 minutes for the two plans to cost the same

9+.11(400) = 9+ 44 = $53 when they cost the same

17+.09(400) = 17 +36 = $53