What is the value of x. (2x+7)(4x-10)

Answer this question only if you know the 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

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*