Will choose the brainliest!
explain why the vertical line test is used to determine if a graph represents a function.

H(x)=4x2-5x h(-3) what is the answer?

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

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 =