Question 663256
Let {{{g(x) = 7x}}}, so f(x) must be {{{f(x) = 10/(sqrt(x+10))}}} to get <img src="http://latex.codecogs.com/gif.latex?\Large h(x) = (f \circ g)(x) = \frac{10}{\sqrt{7x+10}}" title="x" />


Alternatively, you can let {{{g(x) = 7x+10}}}, which will make {{{f(x) = 10/(sqrt(x))}}} and this will give you the same function {{{h(x)}}}