-3x -10y = -20
-5x -6y = 20

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?

Which of the following is not a subset of {1,2,3}?

Identify this conic section. x2 - y2 = 16 o line circle ellipse parabola hyperbola