Question

Marco’s car holds 18 gallons of gasoline. Driving on the highway, the car uses approximately 2 gallons per hour. Let h represent the number of hours Marco has been driving on the highway. Write an expression that shows how many gallons of gasoline Marco has left after driving h hours.

a) 18−2h
b) 18+2h
c) 18h−2
d) 18−h

Answer 1

The expression that represents the amount of gasoline remaining in Marco's car after driving for h hours is 18 - 2h.

Step-by-step explanation:

The question involves creating an expression to represent the amount of gasoline Marco's car has left after driving for h hours on the highway. Marco's car holds 18 gallons of gasoline and uses approximately 2 gallons per hour when driving on the highway. To create this expression, we start with the full capacity of the gasoline tank (18 gallons) and subtract the gallons used per hour (2 gallons) multiplied by the number of hours driven (h).

Therefore, the expression that shows how many gallons of gasoline Marco has left after driving h hours is 18 - 2h.