What is the domain of f(x) = (x + 2)2 – 1?

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

What is the perimeter of an isosceles triangle with each leg measuring 2x+3 and the base measuring 6x-2?

Which equation represents a line that passes through the point (9, -4) and has a slope of 3/5?