Help pls, i can’t find the answer. the answer has to be a whole number

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

What is the greater volume 72 quarts or 23 gallons

2x minus y equals 6, x plus y equals negative 3