document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=63494>Question 63494</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You have $9,000 to invest in three Internet companies listed on the stock market. You expect the annual returns for companies A, B and C to be 10%, 9% and 6%, respectively. You want the combined investment in comapnies B and C to be twice that of company A. How much should you invest in each company to obtain an average return of 8%?\r<BR>\n" );
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document.write( "1.) Set up three equations.<BR>\n" );
document.write( "2.) Solve using any of the differnt types of matrix equations, and state which method you are using. \r<BR>\n" );
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document.write( "** Please help me with this if you can, I have been trying for about an hour and a half now, and I am completley stumped!!   THANK YOU!! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #44166 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=44166\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1.) Set up three equations.<BR>\n" );
document.write( "A+B+C=9000<BR>\n" );
document.write( "2A=B+C<BR>\n" );
document.write( "0.1A+0.09B+0.06C=0.13*9000<BR>\n" );
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document.write( "Matrices:\r<BR>\n" );
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document.write( "1......1......1<BR>\n" );
document.write( "2.....-1.....-1<BR>\n" );
document.write( "0.10..0.09..0.06<BR>\n" );
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document.write( "9000<BR>\n" );
document.write( "0<BR>\n" );
document.write( "1170<BR>\n" );
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document.write( "Multiply the inverse of the 3 x 3 matrix times the 3 x 1 matris<BR>\n" );
document.write( "to get the solution matrix:<BR>\n" );
document.write( "A=3000<BR>\n" );
document.write( "B=17000<BR>\n" );
document.write( "C=-11000<BR>\n" );
document.write( "Comment:  This doesn't make any sense.  <BR>\n" );
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document.write( "2.) Solve using any of the differnt types of matrix equations, and state which method you are using. <BR>\n" );
document.write( "Not sure what they mean by this.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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