Question

Coimpany A charges $25 per month plus $0.22 per minute for cell phone service. Company B charges $35 per month plus $0.12 per minute. How many of usages is needed in one month to make Company B a better deal?

Answer 1

If the number of minutes used is x, Company A charges:\[25+0.22x\]and Company B charges:\[35+0.12x\]Company B is a better deal when:\[25+0.22x>35+0.12x\]Rearranging: \[0.1x>10\] giving x > 100 minutes, so when over 100 minutes are used, Company B is better.

Answer 2

nicely done