## Introductory Algebra for College Students (7th Edition)

The cost for the rental would be: $$125 + 0.15x$$
We know that before we drive any miles, we already have to pay $125$ dollars for the week to rent the car, so we have to add $125$ to the mileage charge. The mileage charge would be calculated by multiplying $0.15$ by the number of miles, $x$. Putting it all together, we get: $$125 + 0.15x$$