document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=773697>Question 773697</A>: <I><SPAN STYLE=\"word-break: break-all;\"> if AB is perpendicular to CD, find the valve of a if A(-2,4) B(3,5) C(-1,-3) and D(4,a)<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #471755 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=471755\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Using equation for slope (m)<BR>\n" );
document.write( "y2 - y1/x2 - x1<BR>\n" );
document.write( "AB<BR>\n" );
document.write( "5 - 4/3-(-2)<BR>\n" );
document.write( "1/5<BR>\n" );
document.write( "CD<BR>\n" );
document.write( "a -(-3)/4 -(-1)<BR>\n" );
document.write( "a + 3/5<BR>\n" );
document.write( "Lines perpendicular to one<BR>\n" );
document.write( "another have slopes that<BR>\n" );
document.write( "multiply together to give -1<BR>\n" );
document.write( "m1 * m2 = -1<BR>\n" );
document.write( "1/5 * a + 3/5 = -1<BR>\n" );
document.write( "a + 3/25 = -1<BR>\n" );
document.write( "a + 3 = -25<BR>\n" );
document.write( "a = -28<BR>\n" );
document.write( "Hope this helps<BR>\n" );
document.write( ":-)<BR>\n" );
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