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December 18, 2014

December 18, 2014

Posted by **Anonymous** on Saturday, October 24, 2009 at 4:10pm.

x+2y=5

2x+4y=7

How do I determine if these two are perpendicular?

- math -
**Laura**, Saturday, October 24, 2009 at 5:11pmperpendicular lines have negative reciprocal slopes such as 3 and -1/3

so put them into y=mx+b form and see.

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