document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=970554>Question 970554</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I really need help with this fast! \r<BR>\n" );
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document.write( "The variable z varies jointly with x and y and inversely with the square of t. Also, z=5 when x=2, y=-3, and t=1/2. Write a function such that f(y)=t when x=-12/(5z)^2 and z=2/5.\r<BR>\n" );
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document.write( "f(y)=________\r<BR>\n" );
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document.write( "      please explain and thanks in advance. </SPAN>\n" );
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