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Solve the system of equations. y= 2x y= x^2 - 15

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.

If a line is defined by the equation y = 5x + 2, what is the slope?