6+8x+3x²=0
find "x" step by step

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

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 =