Write any algebraic expression with at least two operations and the word phrase it represents.

Which equation represents h for right triangle abc

7x^2-9x+5=0 find the discriminant and number of real solutions

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