Acustomer is owed $30.00. how many different combinations of bills, using only five, ten, and twenty dollar bills, are possible to give the customer his or her change

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 expression shows the sum of the polynomials with like terms grouped together

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?