f(6) means that you look at x = 6 and notice the y-axis, then you will get the answer.
If you don't know. f(6) = -6 (Look at x = 6 then look at y = -6.)
Also for g(5), same with f(6). Look at x = 5 and notice the y-axis. When x = 5, y = -5.
Now we know that f(6) = -6 and g(5) = -5
Substitute f(6) = -6 and g(5) = -5 for easier look.
[tex]-6-6*(-5) = -6+30 = 24[/tex]
So the answer is 24.
