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