The cost to rent a car is $25 plus an additional $0.15 for each mile the car is driven. How many miles was a car driven if it had a bill of $71.80?

(A) 479

(B) 312

(C) 454

(D) 645

The cost to rent a car is $25 plus an additional $0.15 for each mile the car is driven.

x = the number of miles

y = total cost

y = 0.15x + 25 [costs $0.15 per mile plus $25]

Since you know the bill/total cost was $71.80, you can plug it into the equation.

y = 0.15x + 25

71.80 = 0.15x + 25

Now you need to find "x" (the number of miles). Subtract 25 on both sides

71.80 - 25 = 0.15x + 25 - 25

46.80 = 0.15x Divide 0.15 on both sides

312 = x

The car was driven 312 miles. Your answer is B