SOLUTION: A car rental company has two rental rates. Rate 1 is $72 per day plus $0.16 per mile. Rate 2 is $144 per day plus $0.08 per mile. If you plan to rent for one week, how many mile

Question 169384: A car rental company has two rental rates. Rate 1 is $72 per day plus $0.16 per mile. Rate 2 is $144 per day plus $0.08 per mile. If you plan to rent for one week, how many miles would you need to drive to pay less by taking Rate 2?
Answer by Mathtut(3670) (Show Source): You can put this solution on YOUR website!
so we have 72d+.16m for rate 1 and 144d+.08m for rate 2. where d is days and m is mileage. set is to rate 2 :
144(7)+.08m < 72(7)+.16m
:
1008+.08m < 504+.16m
:
-.08m < -504.......we need to divide by -.08 remembering that when you divide by a negative that the inequality reverses.
:
miles

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