Question 662890
Two plans
A = 35 + .1/mile
B = 25 + .25/mile
5 Day Rental
When is A<B
35 + .1x < 25 + .25x
35 - 25 < .25x - .1x
10 <.15x
x > 66.7 miles

Proof
35 + .1(66.7) = 41.7
25 + .25(66.7) = 41.7
At 66.7 or 67 miles the deals are the same, but greater than 67 miles the first deal is cheaper.

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