Given the equation shown, which expression is equivalent to x?
x2 + y2 = 4z

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?

For the inequality |c| < |d| to be true, which of the following must be true?

Collin did the work to see if 10 is a solution to the equation r/4=2.4