Linear functions SAT question

Choice C is correct. The value of $f(2)$ can be found by substituting $2$ for $x$ in the given equation $f(x)=x+7$, which yields $f(2)=2+7$, or $f(2)=9$. The value of $g(2)$ can be found by substituting $2$ for $x$ in the given equation $g(x)=7x$, which yields $g(2)=7(2)$, or $g(2)=14$. The value of the expression $4f(2)-g(2)$ can be found by substituting the corresponding values into the expression, which gives $4(9)-14$. This expression is equivalent to $36-14$, or $22$.

Choice A is incorrect. This is the value of $f(2)-g(2)$, not $4f(2)-g(2)$.

Choice B is incorrect and may result from calculating $4f(2)$ as $4(2)+7$, rather than
$4(2+7)$.

Choice D is incorrect and may result from conceptual or calculation errors.