Answer:
7.5 gallons
Step-by-step explanation:
Given:
The Thomas family went for a Sunday drive.
Before they left, Mr. Thomas noticed the gas tank was ¾ full.
When they returned home the gas tank was ⅓ full.
Total capacity of the gas tank = 18 gallons
<u>Question asked:</u>
How many gallons of gas did the car use on the drive?
<u>Solu</u>tion:
Before they left, quantity of gas in the tank = ![\frac{3}{4} \times18=\frac{54}{4} =13.5\ gallons](https://tex.z-dn.net/?f=%5Cfrac%7B3%7D%7B4%7D%20%5Ctimes18%3D%5Cfrac%7B54%7D%7B4%7D%20%3D13.5%5C%20gallons)
When they returned, quantity of gas in the tank = ![\frac{1}{3} \times18=\frac{18}{3} =6\ gallons](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B3%7D%20%5Ctimes18%3D%5Cfrac%7B18%7D%7B3%7D%20%3D6%5C%20gallons)
Quantity of gas used on the drive = 13.5 - 6 = 7.5 gallons
Therefore, 7.5 gallons of gas used on the drive by Thomas family.