Shown here is a mathematical steps taken when solving an equation identify the mathematical reasoning or property used to simplify from the first step to the second step. 8D=56. D=7. (DON’T COMMENT UNLESS YOU’re 100% SURE ITS CORRECT)

Answer this question! 30 points and brainliest!

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 =

Plz ( true - false) all triangles have interior angles whose measure sum to 90.