The inequality 6 - 2/3x < x-9 is equivalent to what?

Asap 25 pts brainliest to right best/answer

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

Icould really use some with this question.