Which is the correct way to evaluate the expression 48−(29−17)?

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

Which of the functions graphed below has a removable discontinuity?

Pls the last one and it has to be like number 6