Simplify.
(4v2-5v-1) + (7v2-3v+2)

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.

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

During a wright loss challenge your friend goes from 125 pounds to 100 pounds.what was the percent weight loss