One rental car company charges $65 per day with unlimited miles. another rental car company charges $42 per day plus $0.20 per mile. for a one-day rental, what mileage makes the cost of the two options equal?

This is a problem of System of Equations. So in this problem we have two rental car companies. Thus, we can write a system of equation by analyzing the statements step by step:

One rental car company charges $65 per day with unlimited miles:

That is the final cost you will pay, in dollars, at the end of the day, by using the car will be:



This is true because this company offers you a plan for unlimited miles.

Another rental car company charges $42 per day plus $0.20 per mile:

In a mathematical language that is:



Therefore, for a one-day rental, the mileage that makes the cost of the two options equal is:

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