Simplify the expression. -2x - 4 + 5x + 5

Answer this question only if you know the answer! 30 points and

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

If the discriminant if a quadratic equation is 4 which statement describes the roots?