document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1128283>Question 1128283</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Write an equation describing the relationship of the given variables.<BR>\n" );
document.write( "y varies jointly as x and the square root of z and when x = 8 and z = 49,then  y = 840. \r<BR>\n" );
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document.write( "*I know that the formula is z=kyx, but every time I go plug in the variables in each appropriate place the answers are wrong. My answers so far have been k= 840/ 8 sqrt(49), k=840/ 8 sqrt(7), and y= 840/ 8 sqrt(49). If someone can help explaining how to correctly set up joint variation equation, it would be greatly appreciated. Thanks.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #744778 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=744778\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Write an equation describing the relationship of the given variables.<BR>\n" );
document.write( "y varies jointly as x and the square root of z and when x = 8 and z = 49,then y = 840.<BR>\n" );
document.write( "y = kx*<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28z%29 ALIGN=MIDDLE  ALT=\"sqrt%28z%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "8k*<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%2849%29 ALIGN=MIDDLE  ALT=\"sqrt%2849%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 840<BR>\n" );
document.write( "8k * 7 = 840<BR>\n" );
document.write( "56k = 840<BR>\n" );
document.write( "k = 840/56<BR>\n" );
document.write( "k = 15<BR>\n" );
document.write( "the equation<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+15x%2Asqrt%28z%29 ALIGN=MIDDLE  ALT=\"y+=+15x%2Asqrt%28z%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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