Please help im very Dumd;-;

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.

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Which is greater, 7 p 5 or 7 c 5? 7p5 7c5