Answer:

The price of one gallon of gasoline= $2.25
Explanation:
Given : You buy 13 gallons at p dollars per gallon and pay $29.25.
Cost of 13 gallons gasoline= 13p
An equation to find the price of one gallon of gasoline will be:

To finde p , we divide both sides by 13 , we get

Hence, the price of one gallon of gasoline= $2.25