SOLUTION: Two cell phone companies are advertising rates. Company A charges a rate $20 per month plus $0.05 per minute. Company B charges a rate of $10 per month plus $0.10 per minute. What
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Question 503363: Two cell phone companies are advertising rates. Company A charges a rate $20 per month plus $0.05 per minute. Company B charges a rate of $10 per month plus $0.10 per minute. What is the number of minutes used above which Company A costs more than Company B?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Let x be the number of calls
company B 10 + 0.10 x
company A 20 + 0.05 x
company B < company A
20 + 0.05 x < 10 + 0.10 x
20 + 0.05 x < 10 + 0.10 x
20 - 10 < 0.1 x -0.05 x
10 < 0.05 x
200 < x
x should be greater than 200 calls
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