Can someone me with this post and my other post i posted like 10 minutes ago but no one answered? see attached

If f(x)=2x+2and g(x)=x^3, what is (g•f)(2)

2x minus y equals 6, x plus y equals negative 3

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm