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01-02-2015
Mathematics

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Write the vertex form equation for this parabola: Focus (3,-9), Directrix X=-3

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01-02-2015

Y=KX+M
-9=(-3/9)*-3+m
-9=1+M
M=-10

Y=(-3/9)-10 is the answer

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im having math trouble

Help me pick an answer please