document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=259761>Question 259761</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a little help please..\r<BR>\n" );
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document.write( "Which TWO linear equations represent perpendicular lines? Select two choices. <BR>\n" );
document.write( "       y = 2x + 4<BR>\n" );
document.write( "       x - 3y = -9<BR>\n" );
document.write( "       y = -2x - 3<BR>\n" );
document.write( "       y = ½x - 4  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #191209 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=191209\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> perpendicular lines have slopes whose product =-1<BR>\n" );
document.write( "put the equations in the form y=mx+b<BR>\n" );
document.write( "where m is the slope<BR>\n" );
document.write( "fortunately the second pair is in that form and <BR>\n" );
document.write( "-2*1/2=-1 they are perpendicular\r<BR>\n" );
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document.write( "the first pair y=2x+4<BR>\n" );
document.write( "and x-3y=-9<BR>\n" );
document.write( "add -x to both sides<BR>\n" );
document.write( "-3y=-x-9<BR>\n" );
document.write( "divide both sides by -3<BR>\n" );
document.write( "y=-x/-3-9/-3<BR>\n" );
document.write( "y=x/3+3<BR>\n" );
document.write( "m=1/3<BR>\n" );
document.write( "and m=2<BR>\n" );
document.write( "2*1/3 does not =-1<BR>\n" );
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