document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=688182>Question 688182</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Dear Sir/ Madam a pleasant day! please help me with a word problem about joint variation, I am not sure whether my answer is right or wrong.\r<BR>\n" );
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document.write( "If y varies jointly as x and the square root of z, and inversely as the cube of w, and y = 8 when x=3, z=16 and w=2, find y when x=5, z=25 and w=2.\r<BR>\n" );
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document.write( "I answered 8/133.33, please help me and thank you so much!<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 #425540 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=425540\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If y varies jointly as x and the square root of z, <BR>\n" );
document.write( "and inversely as the cube of w,<BR>\n" );
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document.write( "y = k*x*sqrt(z)/w^3<BR>\n" );
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document.write( "Solve for \"k\" using \"y = 8 when x=3, z=16 and w=2\"<BR>\n" );
document.write( "8 = k*3*4/2^3<BR>\n" );
document.write( "8 = k(3/2)<BR>\n" );
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document.write( "k = 16/3<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "y = (16/3)*x*sqrt(z)/w^3<BR>\n" );
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document.write( "Find y when x=5, z=25 and w=2.<BR>\n" );
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document.write( "y = (16/3)*5*5/8<BR>\n" );
document.write( "y = (2/3)25<BR>\n" );
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document.write( "y = 16 2/3<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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