Cell phone company A charges $40 a month, with 500 free minutes and $0.10 a minute after that. Cell phone company B charges $25 a month and all minutes cost $0.05.

Answer 1

.10(m-500) + 40 = .05m + 25

.05m = 35

,,m = 700 minutes per month and both cost the same

more than 700 go with B

less than 700 A is cheaper