The height of a ball is modeled by f(x)= -16x^2 + 128x, where x is the number of seconds after the ball is hit. how long is the ball in the air?

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

Aadc is formed by reflecting aabc across line segment ac, as shown in the figure. if the length of ac is 4 units, the area of aadc is square units.

The architect's side view drawing of a saltbox-style house shows a post that supports the roof ridge. the support post is 8 ft tall. the distance from the front of the house to the support post is less than the distance from the post to the back of the house. how far from the front of the house is the support post positioned?