A rental car agency charges a flat fee of $25 per day plus $0.15 for each mile driven. The total charge for one day's rental was $75.30. How would you set up the equation

Question

I am not looking for the answer. I am looking for the equation.

Answer 1

Let "C" be the total cost of renting the car. Let "m" be the number of miles driven. Let "d" be the number of days the car is rented for.

So the equation for Cost (C) would be:

C = 25d + 0.15m (that's $25 times the number of days plus $0.15 times the number of miles driven).

We are told that d = 1 and that C = $75.30 so plugging those in we get:

75.30 = 25(1) + 0.15m or

75.30 = 25 + 0.15m

Answer 2

The flat rate is $25.

The variable rate is $0.15.

The total charge was $75.30.

Each trip taken be denoted by x.

The equation is:

75.30=.15x+25

Solve for x for miles driven.