Question

The cost of renting a car is a flat rate of $45 per day plus $0.25 for each mile you drive. How far can you drive for $75?
12 miles
60 miles
120 miles
300 miles
None of the above.

Answer 1

I think it’s none of the above

Answer 2

It is given that the cost of renting a car is a flat rate of $45 per day plus $0.25 for each mile you drive. So cost as a function of distance traveled $x$ is

$C(x)=45+0.25x$.

When $C=\ 75$,

$75=45+0.25x\\ 0.25x=30\\ x=120$

So for $75, the driver can drive $120 \;miles$