Question 53513
A truck can be rented from basic rental for $50 per day plus $0.20 per mile. roadrunners charges $20 per day plus $0.50 per mile to rent the same truck. how many miles must be driven in a day to make the rental cost for basic rental a better deal than that for roadrunners??
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Let "x" be the number of miles driven iin a day.
Basic rental cost = 50+0.20x
Roadrunner cost = 20+0.50x
When will Basic be better than Roadrunner?
When 50+0.20x < 20+0.50x
30 <0.30x
x>100 miles 
Basic is cheaper than Roadrunner if the number of miles
driven in a day is greater than 100.
Cheers,
Stan H.