Answer:
B. [tex]16x+8[/tex]
Step-by-step explanation:
We have, [tex]f(x)=8x[/tex] and [tex]g(x)=2x+1[/tex].
It is required to find [tex]f\circ g(x)[/tex].
Substituting the functions, we get,
[tex]f\circ g(x)[/tex]
⇒ [tex]f(g(x))[/tex]
⇒ [tex]f(2x+1)[/tex]
⇒ [tex]8\times (2x+1)[/tex]
⇒ [tex]16x+8[/tex]
Thus, we have,
[tex]f\circ g(x)[/tex] = [tex]16x+8[/tex].
Hence, option B is correct.