Can someone me with geometry . venn diagrams and law of detachment statements .

Bring the fraction a/a-4 to a denominator of 16-a^2

For g(x) = 5x - 3 and h(x) = [tex]\sqrt{x}[/tex], find (g · h)(4)

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)