Which of the following is the value of 2x' +5x+9 when x =10?
(3) 160
(1) 259
(2) 1,290
(4) 2,059

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