What is the additive inverse of the expression a - b

Match each expression with its simplified form.

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

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?