document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=268638>Question 268638</A>: <I><SPAN STYLE=\"word-break: break-all;\"> use lines with the equation 3x+4y=12 and 6x+ry=12 <BR>\n" );
document.write( "a)find r if the lines are parallel. <BR>\n" );
document.write( "b)find r if the lines are perpendicular </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #196843 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=196843\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> use lines with the equation 3x+4y=12 and 6x+ry=12 <BR>\n" );
document.write( "a)find r if the lines are parallel. <BR>\n" );
document.write( "b)find r if the lines are perpendicular<BR>\n" );
document.write( "-------------<BR>\n" );
document.write( "The slope of 3x + 4y = ... is -3/4.  (The right side has no effect on the slope)<BR>\n" );
document.write( "--------<BR>\n" );
document.write( "The slope of 6x + ry = ... is -6/r<BR>\n" );
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document.write( "a) parallel means the same slope<BR>\n" );
document.write( "-6/r = -3/4<BR>\n" );
document.write( "r = 8<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "b) perpendicular means the slope is the negative inverse, = 4/3<BR>\n" );
document.write( "-6/r = 4/3<BR>\n" );
document.write( "r = -4.5<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );