Question

Car rental agency A charges $50 per day plus 10

cents per mile driven. Agency B charges $20 per day plus 30 cents per mile driven.
When will car rental agency A be cheaper than car rental agency B for a one-day rental?

Answer 1

after 150 miles

Explanation:

y(cost) = x(miles driven) + b(starting cost)

y = 0.1x + 50

y = 0.3x + 20

0.3x + 20 = 0.1x + 50

0.2x = 30

x = 150

y = 0.3 (150) + 50

y = 45 + 20

y = 65