Question

Two sisters drove 144 miles on a camping trip. They averaged at least 32 miles per gallon on the trip. Describe the number of gallons of gas they used.

Answer 1

The answer should be 4.5 because they used AT LEAST 32 miles per gallon. So, 144/32=4.5 and since it's AT LEAST 32, 4.5 is the max amount used.

Answer 2

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

We have then:

n: number of gallons

d: distance traveled

r: distance rate per gallons

The equation that relates the variables is given by:

$n = \frac{d}{r}$

Substituting values we have:

$n = \frac{144}{32}\\n = 4.5 gallons$

Answer:

The number of gallons of gas they used is:

$n = 4.5 gallons$