If you are traveling 543 miles and you know that your car gets 18 miles per gallon or gasoline approximately how many gallons of gasoline will you need for a one way trip?

To determine how many gallons of gasoline you'll need for a 543-mile trip with a car that gets 18 miles per gallon, you can divide the total distance by the fuel efficiency. So, 543 miles ÷ 18 miles per gallon equals approximately 30.17 gallons. Therefore, you will need about 30.2 gallons of gasoline for a one-way trip.