# Math

State the normal of a line that is parallel to 2x-4y+5

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1. 2x-4y+5=a so rearranging,
-4y=a-2x-5 or
y=-a/4+2x/4+5/4
The slope of this line is 2/4. A line normal to this would have a slope of minus the inverse, or -4/2, or -2. So the equation of normal line would be:

y=-2x

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posted by FredR

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