Question

please help me:) will give medal

Answer 1

http://gyazo.com/58c758f83a693dd5dbd0ba0de7af3872

Answer 2

So we have
g(x) = x-4
h(x) = 4x-3

(h-g)(x) means that you take the equation of g and subtract it from the equation of g.
so that would be (4x-3) - (x-4)
Combine (remember to distribute the - to both the x and -4)

(h+g)(x) would be the same but with a + instead of a -.

(h*g)(-1) you would do the same setup, but with multiplication. And then what the (-1) means is that anywhere there would be an x, you put in -1 and solve.