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AoPS Wiki:Problem of the Day/July 11, 2011

< AoPS Wiki:Problem of the Day
Revision as of 20:49, 10 July 2011 by Btilm305 (talk | contribs) (Protected "AoPSWiki:Problem of the Day/July 11, 2011": Problem of the Day ([edit=sysop] (indefinite) [move=sysop] (indefinite)))
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If the graphs of $2y+x+3=0$ and $3y+ax+2=0$ are to meet at right angles, what is the value of $a$?

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