Your friend shows you a coin collection. In it , 28-50 of coins are quarters. What percents of the coins are quarters?

Anyone know? will mark brainliest if correct

What is the value of x in the following equation? -3x-2=2x+8

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 =