Question 433521
cost of plan 1: 20+0.05m (where m is the number of minutes you make long distance calls

cost of plan2: 5+0.10m

when are they equal?

when 20+0.05m=5+0.1m

solve for m:

20-5=0.1m-0.05m
15=0.05m
m=15/0.05
m=300 min

the cost of both plans at 300 min is 20+0.05 x 300=$35