Matteo is centering a poster on the back of a door that is 32 inches wide. the poster is 18 1/2 inches wide. how far from the edge of the door should matteo hang the poster?

The path traveled by a bottlenose dolphin as it jumps out of water is modeled by the equation y=-0.4+3x, where t is the height above water and x is the horizontal distance in feet. if a beam of light is shone upward at an angle modeled by the equation x+y=10, at what height from the waters surface will the beam of light hit the dolphin