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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?

  • algebra -

    A: cost= 3*55+.35m
    B: cost=3*50+.40m

    set the costs equal, and solve for m.

  • algebra -

    so 12(8)x ≥ 72
    x ≥ 72/96
    x ≥ 3/4 ft

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