SOLUTION: A cell phone carrier charges $15/month and $0.40/minute. Another carrier charges $30/month and $0.25/minutes. How many minutes need to be used to make the plans equal?

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Question 631237: A cell phone carrier charges $15/month and $0.40/minute. Another carrier charges $30/month and $0.25/minutes. How many minutes need to be used to make the plans equal?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
y=.4x+15;
y=.25x+30
100 minutes will cost $55 dollars