Best rentals charges a daily fee plus a mileage fee for renting its cars. barney was charged $81 for 3 days and 300 miles, while mary was charged $145 for 5 days and 600 miles. what does best rental charge per day and per mile?

For this case, the first thing we must do is define variables:

x: rental charge per day

y: rental charge per mile

We write the system of equations:

3x + 300y = 81

5x + 600y = 145

Solving the system we have:

x = 17

y = 1/10

Answer:

rental charge per day = 17 $

rental charge per mile = 1/10 $