Question

Javier is comparing costs of two cars. Car A costs $130 per month for insurance and $0.10 per mile to run. Car B costs $108 per month for insurance and $0.15 per mile to run. He defines x as the number of miles driven each month and y as the total cost to run the car. Which set of equations can be used to find the number of miles Javier would need to drive to make the costs equal?

Answer 1

The answer is 130 + .10m = 108 + .15m

Answer 2

Let 'x' be the number of miles driven each month

Let 'y' be the total cost to run the car

Car A costs $130 per month for insurance and $0.10 per mile to run.

Equation becomes:
`130+0.10x`

Car B costs $108 per month for insurance and $0.15 per mile to run.

Equation becomes:
`108+0.15x`

Now, we will make these equations equal to make the costs equal.

`130+0.10x` =
`108+0.15x`