Can a triangle have two right angles?

When y’all answer can y’all explain too !

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 =

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2