Question

suppose a car uses one gallon of gasoline for every 20 miles traveled.
how many miles could be traveled in the car on $30 if gasoline cost $2.50 a gallon?
a $22.00
b $27.50
c $32.75
d $41.25
a 180 miles
b 220 miles
c 240 miles
d 280 miles

Explanation:

Step1: Find gallons of gasoline bought

First, find how many gallons of gasoline can be bought with $30 at $2.50 per gallon. The formula for gallons ($g$) is $g=\frac{\text{Total money}}{\text{Cost per gallon}}$. So, $g = \frac{30}{2.50}$.
$\frac{30}{2.50}=12$ gallons.

Step2: Find miles traveled

The car travels 20 miles per gallon. So, miles ($m$) = gallons $\times$ miles per gallon. So, $m = 12\times20$.
$12\times20 = 240$ miles.

Answer:

C. 240 miles