document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=121952>Question 121952</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0078660114/algebrahomeworkh>Glencoe Mathematics Geometry</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Find the value of x so that the line containing points at (x,2) and (-4, 5) is perpendicular to the line containing points at (4,8) and (2,-1).\r<BR>\n" );
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document.write( "I have determined that the slope for the line containing (4,8) and 2,-1 is 9/2 and thus the slope for the perpendicular line would be -2/9.  I figured that if I used the y2-y1 over x2-x1 and set that = to -2/9 that I would get the answer and it just is not working.  The book says that the answer is 9.5.  Can you help? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #89519 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=89519\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The work you have done to find the slope of the perpendicular is spot on.  But now you need to use the point-slope form of a line to develop an equation for the perpendicular line.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y-y%5B1%5D=m%28x-x%5B1%5D%29 ALIGN=MIDDLE  ALT=\"y-y%5B1%5D=m%28x-x%5B1%5D%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y-5=-%282%2F9%29%28x-%28-4%29%29 ALIGN=MIDDLE  ALT=\"y-5=-%282%2F9%29%28x-%28-4%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9y-45=-2x-8 ALIGN=MIDDLE  ALT=\"9y-45=-2x-8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x%2B9y=37 ALIGN=MIDDLE  ALT=\"2x%2B9y=37\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now solve for x so that we can answer the question: What must x be when y = 2?\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x=-9y%2B37 ALIGN=MIDDLE  ALT=\"2x=-9y%2B37\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=-%289%2F2%29y%2B37%2F2 ALIGN=MIDDLE  ALT=\"x=-%289%2F2%29y%2B37%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=-%289%2F2%29%282%29%2B37%2F2 ALIGN=MIDDLE  ALT=\"x=-%289%2F2%29%282%29%2B37%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=%28-18%2B37%29%2F2=19%2F2=9.5 ALIGN=MIDDLE  ALT=\"x=%28-18%2B37%29%2F2=19%2F2=9.5\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( " </SPAN>\n" );
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