PLEASE HELP

Let f(x) = 3x + 4 and g(x) = -5x + 1.


Find f[g(x)] and g[f(x)].


Show all of your work, show each step on a new line and explain each step in words. Your final composed functions should be in simplest form.


Please help, I don't know how to do this and I'm getting really behind in math.