Need help with this kind of confused

F(x) = (x^2 + 3x − 4) and g (x) = (x+4) find f/g and state the domain.

What is the solution to the equation below? 3/x-2+6=square root x-2 +8

Which must be true in order for the relationship △zyv ~ △xwv to be correct? zy ∥ wx ∠z ≅ ∠y and ∠w ≅ ∠x zv ≅ vy and wv ≅ vx ∠z ≅ ∠x and ∠w ≅ ∠y