A man sold an article at a gain of 15%. Had he bought it at 10%less and sold it for 14 Rupees less, he would have gained 20% find the price of the article

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

Place the following steps in order to complete the square and solve the quadratic equation,

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?