Hoy mantiene stacks of 10 cards if i have 400 cards draw a pinture

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

Can someone me and plz do the problem

Negative 5 1/12 + negative 4 1/4 + 6 3/4