Please help me I don’t understand :(

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

Micah solves a linear equation and concludes that x = 0 is the solution. his work is shown below. (1 – 3x) = 4(– + 2) 0 = x which statement is true about micah’s solution?

The suare root of 9x plus 7 plus the square rot of 2x equall to 7