Solve the rational expression. Please help me.

How can we find the measure of an exterior angle if we know the measurement of an interior angle

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 the greatest common factor ?