How do I turn the given expression into coordinates? ( in need this as soon as possible, thank you!)

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

If f(x) = 4x - 3 and g(x) = x + 4, 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: