What is the vertex of the graph of f(x) = |x + 5| – 6?

The vertex form is f(x) = |x - h| + k, where the vertex is (h, k). Here, |x + 5| - 6 = |x - (-5)| - 6, so h = -5 and k = -6. The vertex is (–5, –6), choice C.

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