What is y(x)+ab-5 I don’t get the problem

Show algebraically that f and g are inverse functions f(x)=x^2/-6; g(x)=square root of 2x+12

Use the graph to determine the range. which notations accurately represent the range? check all that apply. (–∞, 2) u (2, ∞) (–∞, –2) u (–2, ∞) {y|y ∈ r, y ≠ –2} {y|y ∈ r, y ≠ 2} y < 2 or y > 2 y < –2 or y > –2

What are the sotions to the quadratic equation 9x^2=4