document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=204888>Question 204888</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 4.	A 200 lb batch of feed is being formulated using corn and soybean meal.  The corn is 6.5% crude protein and the soybean meal is 45% crude protein.  The final diet should be 15% crude protein.  How much of each ingredient should be added to mix this batch of feed?\r<BR>\n" );
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document.write( "(HINT:  Take x to be the lbs of corn and y to be the lbs of soybean meal.  Develop two equations and solve them.)<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 #154763 by </B><A HREF=/tutors/aboutme.mpl?userid=ptaylor><B>ptaylor(2198)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ptaylor><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=ptaylor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=154763\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "OK, WE'LL FOLLOW THE HINT:\r<BR>\n" );
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document.write( "Let x=lbs of corn<BR>\n" );
document.write( "And y=lbs of soybean meal<BR>\n" );
document.write( "Now we are told that:<BR>\n" );
document.write( "x+y=200-------------------------eq1<BR>\n" );
document.write( "Now we know that the amount of pure crude protein before they are mixed (0.065x+0.45y) has to equal the amount of pure crude protein after they are mixed (0.15*200), so:\r<BR>\n" );
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document.write( "0.065x+0.45y=0.15*200 simplify<BR>\n" );
document.write( "0.065x+0.45y=30------------------------eq2\r<BR>\n" );
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document.write( "Multiply eq1 by 0.065 (we get: 0.065x+0.065y=13) and then subtract it from eq2 and we get:<BR>\n" );
document.write( "0.385y=17  divide each side by 0.385<BR>\n" );
document.write( "y=44.2 lb ----------------------lbs of soybean meal needed<BR>\n" );
document.write( "substitute y=44.2 into eq1:<BR>\n" );
document.write( "x+44.2=200<BR>\n" );
document.write( "x=200-44.2=155.8---------------lbs of corn needed\r<BR>\n" );
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document.write( "CK<BR>\n" );
document.write( "0.065*155.8+0.45*44.2=0.15*200<BR>\n" );
document.write( "10.1+19.9=30<BR>\n" );
document.write( "30=30\r<BR>\n" );
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document.write( "Hope this helps---ptaylor\r<BR>\n" );
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