Ok i know how to solve compositions when Im provided with x
Here I am dealing with f of g of h
f(x) = 2x-2
g(x) = x^2
h(x) = 9-x
so its f(g(h(x)
But how do i start without an x value?
I don't know what you meant by "tried". Plato told you how to find the compositions.
$\displaystyle f\circ g(x)= f(g(x))= f(7\sqrt{1-x}}= \sqt{7\sqrt{1-x}}$
which could also be written
$\displaystyle \sqrt{7}\sqrt[4]{1- x}$
$\displaystyle g\circ f(x)= g(f(x))= g(\sqrt{x})= 7\sqrt{1- \sqrt{x}}$
I think that there must be a flaw in what program you are using.
If this is indeed correct $\displaystyle g(x)=7\sqrt{1-x}$
then $\displaystyle g\circ g(x)=7\sqrt{1-7\sqrt{1-x}~}$.
If the program does not take that, then either you are typing the symbols incorrectly or there is a flaw in the program.
Then that is a totally incompetent program or you do not know how to use it. I suspect that you are not using enough grouping symbols.
Look at my LaTeX code:
7\sqrt{1-7\sqrt{1-x}} this gives $\displaystyle 7\sqrt{1-7\sqrt{1-x}}$.
Note how carefully the various parts are grouped together using grouping symbols.
Does that program allow LaTeX coding?
If so the you can copy and paste from here.
In any case, you need to contact the program administrator to discuss these concerns.