document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=620191>Question 620191</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A variable a varies jointly as b and the square of c and inversely as d. When a= -14, b=5, c=8, and d=20. Write the equation to represent this variation. Then find a when b=4, c=6, and d=9. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #389972 by </B><A HREF=/tutors/aboutme.mpl?userid=vleith><B>vleith(2983)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=vleith><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=389972\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let the variable be a<BR>\n" );
document.write( "You are told<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=+K+%28bc%5E2%29%2Fd ALIGN=MIDDLE  ALT=\"a+=+K+%28bc%5E2%29%2Fd\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "now plug in the values of  a= -14, b=5, c=8, and d=20 <BR>\n" );
document.write( "and solve for K<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-14+=+K+%285%2A8%5E2%29%2F20 ALIGN=MIDDLE  ALT=\"-14+=+K+%285%2A8%5E2%29%2F20\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-14+=+K+%2864%2F4%29 ALIGN=MIDDLE  ALT=\"-14+=+K+%2864%2F4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-14%2F16+=+K ALIGN=MIDDLE  ALT=\"-14%2F16+=+K\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Plug in K<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=+%28-14%2F16%29%2A%28bc%5E2%29%2Fd ALIGN=MIDDLE  ALT=\"a+=+%28-14%2F16%29%2A%28bc%5E2%29%2Fd\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "now plug in b=4, c=6, and d=9 and solve for a<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=%28-14%2F16%29%2A%284%2A6%5E2%29%2F9 ALIGN=MIDDLE  ALT=\"a+=%28-14%2F16%29%2A%284%2A6%5E2%29%2F9\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );