Brianna is driving on a long road trip. She currently has 9 gallons of gas in her car.
Each hour that she drives, her car uses up 2 gallons of gas. How much gas would be in
the tank after driving for 2 hours? How much gas would be left after t hours?
after t hours, she has 9-2t gals left
9 gal - (2 gal/hr ) 2 hr = 9 gal - 4 gal = 5 gal
9 - 2 t
1hr=2 gal
2hr=4gal
9gal-4gal=5gal
your answer is 5gal
To determine how much gas would be in the tank after driving for 2 hours, we need to subtract the amount of gas used during that time. Here's how we can calculate it:
1. Start with the amount of gas Brianna currently has, which is 9 gallons.
2. Determine the amount of gas used per hour, which is 2 gallons.
3. Multiply the amount of gas used per hour by the number of hours driven, which in this case is 2 hours: 2 gallons/hour × 2 hours = 4 gallons.
4. Subtract the amount of gas used during the hours driven from the starting amount: 9 gallons - 4 gallons = 5 gallons.
After driving for 2 hours, Brianna would have 5 gallons of gas remaining in her tank.
To find out how much gas would be left after t hours, you can use the same approach but substitute "t" for the number of hours driven. Here's the general formula:
Gas remaining after t hours = Starting amount of gas - (Gas used per hour × t)
Simply input the value of "t" (the number of hours driven) into this formula and you will get the gas remaining after that amount of time.