20 + 0.08m = 12 + 0.12m
8 = 0.04m
8/0.04 = m
200 = m
One phone plan charges a $20 monthly fee and $0.08 per minute on every phone call made. Another phone plan charges a $12 monthly fee and $0.12 per minute on each call. After how many minutes is the charge the same for both plans?
A.60 minutes
B.90 minutes
C.120 minutes
D.200 minutes
please explain and show work.
1 answer
1 answer