Question

When driving on a highway lane passed the 23 mile marker with 15 gallons of gas in the tank. When he passed the 73 mile marker, he had 12.5 gallons of gas left.

Answer 1

To calculate the car's average gas mileage, subtract the initial amount of gas from the amount of gas left, and divide the number of miles driven by the change in gallons of gas.

Step-by-step explanation:

To calculate the car's average gas mileage, we need to determine the number of miles driven and the change in the number of gallons of gas. From the 23 mile marker to the 73 mile marker, the student traveled 73 - 23 = 50 miles.

The change in the number of gallons of gas can be calculated by subtracting the amount of gas left (12.5 gallons) from the initial amount of gas (15 gallons). This gives us a change of 15 - 12.5 = 2.5 gallons of gas.

To find the car's average gas mileage, we divide the number of miles driven (50 miles) by the change in the number of gallons of gas (2.5 gallons). The average gas mileage is therefore 50 / 2.5 = 20 miles per gallon.