document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=162149>Question 162149</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hector is performing a chemistry experiment that requires 140 millimeters of a 30% copper sulfate solution. He has a 25% copper sulfate solution and a 60% copper sulfate solution. How many milliliters of each solution should he mix to obtain the needed solution? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #119601 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=119601\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hector is performing a chemistry experiment that requires 140 millimeters of<BR>\n" );
document.write( " a 30% copper sulfate solution. He has a 25% copper sulfate solution and a 60%<BR>\n" );
document.write( " copper sulfate solution. How many milliliters of each solution should he mix<BR>\n" );
document.write( " to obtain the needed solution?<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Let x = amt of 60% solution<BR>\n" );
document.write( ":<BR>\n" );
document.write( "It states that total resulting solution should be 140 ml, therefore<BR>\n" );
document.write( "(140-x) = amt of 25% solution required<BR>\n" );
document.write( ":<BR>\n" );
document.write( "The equation:<BR>\n" );
document.write( ".60x + .25(140-x) = .30(140)<BR>\n" );
document.write( ".60x + 35 - .25x = 42<BR>\n" );
document.write( ".60x - .25x = 42 - 35<BR>\n" );
document.write( ".35x = 7<BR>\n" );
document.write( "x = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7%2F.35 ALIGN=MIDDLE  ALT=\"7%2F.35\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x = 20 ml of 60% solution<BR>\n" );
document.write( "and<BR>\n" );
document.write( "140 - 20 = 120 ml of 25% solution<BR>\n" );
document.write( ";<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Check:<BR>\n" );
document.write( ".6(20) + .25(120) = .3(140)<BR>\n" );
document.write( "12 + 30 = 42 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );