What value of r is a solution to this equation 5r=15

In the past, professional baseball was played at the astrodome in houston, texas. the astrodome has a maximum height of 63.4 m. the height of a baseball t seconds after it is hit straight up in the air with a velocity of 45 ft/s is given by h = -9.8t2 + 45t + 1. will a baseball hit straight up with this velocity hit the roof of the astrodome? use the discriminant to explain your answer.

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?