document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=16295>Question 16295</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Trying to help my student and I cannot remember after 30+ years. Will you please explain each step in detail. I cannot even remember how to make an equation for this. Thank you!\r<BR>\n" );
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document.write( "How much whipping cream (9% butterfat) and how much 2% milk should be mixed to obtain 35 gallons of milk with 4% butterfat? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #7931 by </B><A HREF=/tutors/aboutme.mpl?userid=rapaljer><B>rapaljer(4671)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rapaljer><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=rapaljer><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=7931\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x = amount of whipping cream at 9% (.09).  The rest of the 35 gallons is 2%, so<BR>\n" );
document.write( "35-x = amount of milk at 2%.\r<BR>\n" );
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document.write( "The result is 35 gallons of 4% milk.\r<BR>\n" );
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document.write( ".09x + .02(35-x) = .04(35)<BR>\n" );
document.write( ".09x + .70 - .02x = 1.40<BR>\n" );
document.write( ".07x + .70 = 1.40<BR>\n" );
document.write( ".07x + .70 -.70 = 1.40-.70<BR>\n" );
document.write( ".07x= .70\r<BR>\n" );
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document.write( "Divide both sides by .07:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28.07x%29%2F.07+=+.70%2F.07+=+70%2F7+=10 ALIGN=MIDDLE  ALT=\"%28.07x%29%2F.07+=+.70%2F.07+=+70%2F7+=10\"   DISABLED_style= \"max-width:90%; height:auto;\" > gallons whipping cream<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=35+-+x+=+25 ALIGN=MIDDLE  ALT=\"35+-+x+=+25\"   DISABLED_style= \"max-width:90%; height:auto;\" > gallons 2% milk.\r<BR>\n" );
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document.write( "Check:<BR>\n" );
document.write( "Does  .09(10) + .02(25) = .04(35)<BR>\n" );
document.write( "      .9 + .5 = 1.4 <BR>\n" );
document.write( "It checks.\r<BR>\n" );
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document.write( "R^2 at SCC </SPAN>\n" );
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