SOLUTION: AT&T's fee is 100$ per month and 5 cents per minute. Verizon costs 50$ but 10 cents per minute. Until how long will Verizon be cheaper. Can you please tell me the equation and solu

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Question 176716: AT&T's fee is 100$ per month and 5 cents per minute. Verizon costs 50$ but 10 cents per minute. Until how long will Verizon be cheaper. Can you please tell me the equation and solution and answer.
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
let m be the number of talk minutes
:
AT&T: equation C=100+.05(m)
Ver: equation C=50+.1(m)
:
we are looking for when AT&T will be less than Ver plan
:
100%2B.05m%3C=50%2B.1m
:
-.5m%3C=-50
:
m%3E=100and AT&T will be equal or the cheaper plan
:
highlight%28m%3C100%29} and Verizon will be the cheaper plan
:
so Verizon will be cheaper up to the 100th minute. At 100 minutes the plans will be equal anything greater than 100 minutes and AT&T will be the cheaper plan