Eric spent $60 on 5 shirts that each cost the same price to the shirts were blue how much did the blue shirts cost

What is the missing constant term in the perfect square that starts with x^2 -20x

Average acceleration: i have no idea how to do this.

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =