document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=751635>Question 751635</A>: <I><SPAN STYLE=\"word-break: break-all;\"> determine whether the following pairs of lines are (a) parallel, (b) perpendicular,<BR>\n" );
document.write( "or (c) neither parallel nor perpendicular.<BR>\n" );
document.write( "5x - 6y = 19<BR>\n" );
document.write( "6x + 5y = -30 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #457318 by </B><A HREF=/tutors/aboutme.mpl?userid=Cromlix><B>Cromlix(4381)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Cromlix><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/cgi-bin/show-face.mpl?user=Cromlix><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=457318\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 5x - 6y = 19<BR>\n" );
document.write( "6x + 5y = -30<BR>\n" );
document.write( "Sort into y = mx + c\r<BR>\n" );
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document.write( "6y = 5x - 19<BR>\n" );
document.write( " y = 5/6x - 19/6\r<BR>\n" );
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document.write( "5y = -6x - 30<BR>\n" );
document.write( " y = -6/5x - 6\r<BR>\n" );
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document.write( "As the two gradients 5/6 and -6/5<BR>\n" );
document.write( "multiply together to make -1,<BR>\n" );
document.write( "the two lines are perpendicular <BR>\n" );
document.write( "to each other. (b) </SPAN>\n" );
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