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August 31, 2014

August 31, 2014

Posted by **don** on Tuesday, February 5, 2013 at 7:42pm.

- mathURGENT!!!!!! -
**Reiny**, Tuesday, February 5, 2013 at 8:47pmslope of first line = -1/2

slope of 2nd line = -a/3

to be perpendicular, they must be negative reciprocals of each other, or, when multiplied we should get -1

(-1/2)(-a/3) = -1

a/6 = -1

a = -6

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