document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=138707>Question 138707</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a grocer mixes cookies worth 80 cents a kg with cookies worth 95 cents a kg making a mixture selling at  85 cents a kg. If he mixes 60 kilograms , how many kilograms of each kind does he use? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #101213 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=101213\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a ALIGN=MIDDLE  ALT=\"a\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the kgs of $.80/kg cookies needed<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b ALIGN=MIDDLE  ALT=\"b\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the kgs of $.95/kg cookies needed<BR>\n" );
document.write( "In words, the problem is:<BR>\n" );
document.write( "(kgs $.80/kg cookies) x ($.80/kg) + (kgs $.95/kg cookies) x ($.95/kg) /<BR>\n" );
document.write( "(kgs $.80/kg cookies + kgs $.95/kg cookies) = $.85/kg<BR>\n" );
document.write( "or in symbols,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28.8a+%2B+.95b%29+%2F+%28a+%2B+b%29+=+.85 ALIGN=MIDDLE  ALT=\"%28.8a+%2B+.95b%29+%2F+%28a+%2B+b%29+=+.85\"   DISABLED_style= \"max-width:90%; height:auto;\" > cents/kg<BR>\n" );
document.write( "Also given is:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+%2B+b+=+60 ALIGN=MIDDLE  ALT=\"a+%2B+b+=+60\"   DISABLED_style= \"max-width:90%; height:auto;\" > kg<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28.8a+%2B+.95b%29+%2F+60+=+.85 ALIGN=MIDDLE  ALT=\"%28.8a+%2B+.95b%29+%2F+60+=+.85\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=.8a+%2B+.95b+=+60%2A.85 ALIGN=MIDDLE  ALT=\".8a+%2B+.95b+=+60%2A.85\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=.8a+%2B+.95%2860+-+a%29+=+51 ALIGN=MIDDLE  ALT=\".8a+%2B+.95%2860+-+a%29+=+51\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=.8a+%2B+57+-+.95a+=+51 ALIGN=MIDDLE  ALT=\".8a+%2B+57+-+.95a+=+51\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-.15a+=+-6 ALIGN=MIDDLE  ALT=\"-.15a+=+-6\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=+40 ALIGN=MIDDLE  ALT=\"a+=+40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b+=+60+-+a ALIGN=MIDDLE  ALT=\"b+=+60+-+a\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b+=+60+-+40 ALIGN=MIDDLE  ALT=\"b+=+60+-+40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b+=+20 ALIGN=MIDDLE  ALT=\"b+=+20\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The grocer needs to mix 40 kg of $.80/kg cookies and 20 kg of $.95/kg<BR>\n" );
document.write( "cookies<BR>\n" );
document.write( "check answer:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28.8a+%2B+.95b%29+%2F+%28a+%2B+b%29+=+.85 ALIGN=MIDDLE  ALT=\"%28.8a+%2B+.95b%29+%2F+%28a+%2B+b%29+=+.85\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28.8%2A40+%2B+.95%2A20%29+%2F+60+=+.85 ALIGN=MIDDLE  ALT=\"%28.8%2A40+%2B+.95%2A20%29+%2F+60+=+.85\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2832+%2B+19%29%2F+60+=+.85 ALIGN=MIDDLE  ALT=\"%2832+%2B+19%29%2F+60+=+.85\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=51%2F60+=+.85 ALIGN=MIDDLE  ALT=\"51%2F60+=+.85\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=.85+=+.85 ALIGN=MIDDLE  ALT=\".85+=+.85\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );