document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=295216>Question 295216</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You are making 10 tons of concrete that is 61.1% cement by mixing a 19% cement mixture with a 90% cement mixture.\r<BR>\n" );
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document.write( "a) how much of the 90% cement mixture must you use ? answer in units of tons.<BR>\n" );
document.write( "b) how much of hte 19% cement mixture must you use ? answer in units of tons.\r<BR>\n" );
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document.write( "Thank you in advance for your help !  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #212873 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=212873\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You are making 10 tons of concrete that is 61.1% cement by mixing a 19% cement<BR>\n" );
document.write( " mixture with a 90% cement mixture.<BR>\n" );
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document.write( "a) how much of the 90% cement mixture must you use ? answer in units of tons.<BR>\n" );
document.write( "Let x = amt of 90% cement mixture<BR>\n" );
document.write( "then<BR>\n" );
document.write( "(10-x) = amt of 19% cement mixture<BR>\n" );
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document.write( "The mixture equation<BR>\n" );
document.write( ".90x + .19(10-x) = .611(10)<BR>\n" );
document.write( ".90x + 1.9 - .19x = 6.11<BR>\n" );
document.write( ".90x - .19x = 6.11 - 1.9<BR>\n" );
document.write( ".71x = 4.21<BR>\n" );
document.write( "x = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4.21%2F.71 ALIGN=MIDDLE  ALT=\"4.21%2F.71\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x = 5.93 tons of 90% cement<BR>\n" );
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document.write( "b) how much of hte 19% cement mixture must you use ? answer in units of tons.<BR>\n" );
document.write( "10  - 5.93 = 4.07 tons of 19% cement<BR>\n" );
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document.write( "Check solution in the mixture equation<BR>\n" );
document.write( " .90(5.93) + .19(4.07) = .611(10)<BR>\n" );
document.write( "5.337 + .7733 = 6.11 </SPAN>\n" );
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