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

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