40°
i don’t know the missing angle

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

Reflect the point (7,0) across the y-axis

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 =