Question 445935
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Hi,
Company A charges $55 per day plus $0.35 per mile to rent a car. 
Company B charges $50 per day plus $0.40 per mile
Jack wants to rent a car for three days. How many miles should Jack
 be traveling so that Company A is less expensive than Company B?
Let x represent that number of miles:
  55*3 + .35x < 50*3 + .40x
    5*3 < .05x
   5*3/.05 < x
    300 < x  Jack should be traveling more than 300mi

CHECKING our Answer*** At 301 mi
A 55*3 + .35*301 = 270.35
B 50*3 + .40*301 = 270.40   A < B