Question 253857
Send me an email at justin.sheppard.tech@hotmail.com
I will help you with this problem.  It is a composition of functions.  You plug f(4) in for all x in the g(x) function.  If I show you, it will make perfect sense.  It is hard to understand this one without an explanation to introduce it.
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Justin
justin.sheppard.tech@hotmail.com