X=13; do you need the work? Also for future reference symbolab.com is where I get all my answers.
Option B:
is the correct answer
Step-by-step explanation:
Given functions are:

We have to find g(f(x))
So,

Hence,
Option B:
is the correct answer
Keywords: Functions, Composition
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I think the answer 3\8( i do not know if its right or not)