If y = 4 when x = -6, find y when x = 15.

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?