Please Help I'm in the middle of a test

What is the measure of x, in degrees

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

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)