document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=411817>Question 411817</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A farmer cooperative mixes two brands of cattle feed. Brand x cost $25 per bag and contains 2 units of nutritional element A, 2 units of element B, and 2 units of element C. Brand Y costs $20 per bag and contains 1 unit of nutritional A, 9 units of B and 3 units of C. Find the number of bags of each brand that should be mixed to provide a mixture having a minimum cost per bag. Requirements of nutrients A: 12 B:36 C:24 units. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #289487 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=289487\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Brand x cost $25 per bag and contains 2 units of nutritional element A, 2 units of element B,<BR>\n" );
document.write( " and 2 units of element C.<BR>\n" );
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document.write( " Brand Y costs $20 per bag and contains 1 unit of nutritional A, 9 units of B and 3 units of C.<BR>\n" );
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document.write( " Find the number of bags of each brand that should be mixed to provide a mixture having a minimum cost per bag.<BR>\n" );
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document.write( "Requirements of nutrients A: 12 B:36 C:24 units.<BR>\n" );
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document.write( "Let x = no. of bags of x<BR>\n" );
document.write( "Let y = no. of bags of y<BR>\n" );
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document.write( "Write an equation for each element, put in the slope/intercept for graphing<BR>\n" );
document.write( "element A equation<BR>\n" );
document.write( "2x + 1y = 12<BR>\n" );
document.write( "y = -2x + 12 (Red)<BR>\n" );
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document.write( "element B equation<BR>\n" );
document.write( "2x + 9y = 36<BR>\n" );
document.write( "9y = -2x + 36<BR>\n" );
document.write( "y = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-2%2F9 ALIGN=MIDDLE  ALT=\"-2%2F9\"   DISABLED_style= \"max-width:90%; height:auto;\" >x + 4; (green)<BR>\n" );
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document.write( "element C equation<BR>\n" );
document.write( "2x + 3y = 24<BR>\n" );
document.write( "3y = -2x + 24<BR>\n" );
document.write( "y = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-2%2F3 ALIGN=MIDDLE  ALT=\"-2%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" > + 8; (purple)<BR>\n" );
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document.write( "Graph these three equations<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+graph%28+300%2C+200%2C+-6%2C+10%2C+-10%2C+20%2C+-2x%2B12%2C+%28-2%2F9%29x%2B4%2C+%28-2%2F3%29x%2B8+%29+ ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "I'm going to say 3 bags of x, and 6 bags of y </SPAN>\n" );
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