Can a composite number be a multiple of any other number except itself

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

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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