mrwhite15 mrwhite15 25-02-2022 Mathematics contestada a person observing the tennis ball throw exclaimed, "that ball must have gone 18 feet in the air they wrote the equation 18= -16x2+16x+12 to represent the time in seconds it woulf take for the ball to reach 18 feet in the air solve the equation 18= -16x2+16x+12 for x