Answer:
The value of f(x) when x = 9 is 12.
Step-by-step explanation:
Here, the given function,
[tex]f(x)=\left\{\begin{matrix}6x^2+12 ; &-6<x<9 \\ 12; & 9 \leq x < 13\end{matrix}\right.[/tex]
Thus, for the values greater than -6 and less than 9 the function would be,
[tex]f(x) = 6x^2+2[/tex]
While, for the values greater than equal to 9 and less than 13,
The function would be,
[tex]f(x)=12[/tex]
Hence, it is clear that the value of f(x) when x = 9 is 12.
