SOLUTION: A phone company offers two monthly plans. Plan A costs $12 plus an additional $0.15 for each minute of calls. Plan B costs $21 plus an additional $0.13 for each minute of calls.

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A phone company offers two monthly plans. Plan A costs $12 plus an additional $0.15 for each minute of calls. Plan B costs $21 plus an additional $0.13 for each minute of calls.       Log On


   

Question 806295: A phone company offers two monthly plans. Plan A costs $12 plus an additional $0.15 for each minute of calls. Plan B costs $21 plus an additional $0.13 for each minute of calls.
1. For what amount of calling do both plans cost the same?
2. What is the cost when the two plans cost the same?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
12+.15m=21+.13m,
y=21+.13m
m=450 minutes, y=$79.50 cost