SOLUTION: What is the x-coordinate of the vertex of the graph of f(x)=-7(x-9)^2+3?

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Question 577284: What is the x-coordinate of the vertex of the graph of f(x)=-7(x-9)^2+3?
Answer by jim_thompson5910(35256) About Me  (Show Source):
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f(x)=-7(x-9)^2+3 is in vertex form f(x)=a(x-h)^2+k where h = 9 (which is the x coordinate of the vertex). So the x coordinate of the vertex is 9.