Which is the same as 8³

What is the relationship between all triangles that can be drawn given the same three angles

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 =

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15