Two points A and B are shown on the graph below. Which of the coordinates of a midpoint of AB?
(4 1/2, 1 1/2)
(5, 0)
(4 1/2, 1)
(4 1/2, 2)

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