document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=31832>Question 31832</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I have 2 questions.\r<BR>\n" );
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document.write( "1) are 3x+y=5 and -x+3y=6 perpendicular?\r<BR>\n" );
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document.write( "2) are 3x+y=5 and x+y=3 perpendicular? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #18485 by </B><A HREF=/tutors/aboutme.mpl?userid=mukhopadhyay><B>mukhopadhyay(490)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mukhopadhyay><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=18485\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Equations in the first question are perpendicular to each other; the second one is not.<BR>\n" );
document.write( "Slope of the first equation in (1) is -3; slope of the second equation is 1/3;<BR>\n" );
document.write( "Product of the slopes is -1, implying they are perpendicular. </SPAN>\n" );
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