evaluate: $g(f(-6))$\n$y = f(x)$\n$y = g(x)$

Explanation:

Step1: Find $f(-6)$ from $y=f(x)$

Locate $x=-6$ on the left graph; the corresponding $y$-value is $4$, so $f(-6)=4$.

Step2: Find $g(4)$ from $y=g(x)$

Locate $x=4$ on the right graph; the corresponding $y$-value is $0$, so $g(4)=0$.

Answer:

$0$