Question 847717
First we must find f(2)



{{{f(x)=-3x+4}}}



{{{f(2)=-3(2)+4}}} Replace ALL copies of x with 2.



{{{f(2) = -6 + 4}}}



{{{f(2) = -2}}}



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Then we plug this into {{{g(x)}}}



{{{g(x)=x+7}}}



{{{g(f(2))=f(2)+7}}} Replace ALL copies of x with f(2)



{{{g(f(2))=-2+7}}} Replace f(2) on the right side with -2 (above we found {{{f(2) = -2}}})



{{{g(f(2))=5}}}