Determine whether the formula describes y as a function of x. Explain your reasoning. y = 9x + 1

If f(x) = 3x2 - 2x+4 and g(x) = 5x + 6x - 8, find (f-g)(x).

Plzz ! if you were constructing a triangular frame, and you had wood in the length of 4 inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no? = explain your mathematical thinking/show your work:

V=x^4-y^4 pick three expressions that can represent the three dimensions of the prism (each in meters)