document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=947942>Question 947942</A>: <I><SPAN STYLE=\"word-break: break-all;\">  	<BR>\n" );
document.write( "Use a system of equations to model the situation and then solve by any method.<BR>\n" );
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document.write( "An orchestra consists of string instruments and wind instruments in a ratio of 9 to 4.  There are 91 string and wind instruments in the orchestra.  How many string instruments are there?  How many wind instruments?<BR>\n" );
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document.write( "	63 string instruments 28 wind instruments<BR>\n" );
document.write( "	65 string instruments 26 wind instruments<BR>\n" );
document.write( "	60 string instruments 31 wind instruments<BR>\n" );
document.write( "	72 string instruments 19 wind instruments<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #578555 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20850)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=578555\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "a ratio of 9 to 4. There are 91 string and wind instruments in the orchestra.\r<BR>\n" );
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document.write( "let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=string_instruments=x ALIGN=MIDDLE  ALT=\"string_instruments=x\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=wind_instruments=y ALIGN=MIDDLE  ALT=\"wind_instruments=y\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2Fy=9%2F4 ALIGN=MIDDLE  ALT=\"x%2Fy=9%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4x=9y ALIGN=MIDDLE  ALT=\"4x=9y\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=%289%2F4%29y ALIGN=MIDDLE  ALT=\"x+=%289%2F4%29y\"   DISABLED_style= \"max-width:90%; height:auto;\" >...eq.1\r<BR>\n" );
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document.write( "if there are <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=91 ALIGN=MIDDLE  ALT=\"91\"   DISABLED_style= \"max-width:90%; height:auto;\" > string and wind instruments in the orchestra, we have\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2By=91 ALIGN=MIDDLE  ALT=\"x%2By=91\"   DISABLED_style= \"max-width:90%; height:auto;\" >.......eq.2\r<BR>\n" );
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document.write( "solve the system\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%289%2F4%29y ALIGN=MIDDLE  ALT=\"x+=+%289%2F4%29y\"   DISABLED_style= \"max-width:90%; height:auto;\" >...eq.1........substitute in eq.2<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2By=91 ALIGN=MIDDLE  ALT=\"x%2By=91\"   DISABLED_style= \"max-width:90%; height:auto;\" >.......eq.2<BR>\n" );
document.write( "---------------------------------------\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%289%2F4%29y%2By=91 ALIGN=MIDDLE  ALT=\"%289%2F4%29y%2By=91\"   DISABLED_style= \"max-width:90%; height:auto;\" >.......eq.2.................solve for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y ALIGN=MIDDLE  ALT=\"y\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9y%2F4%2B4y%2F4=91 ALIGN=MIDDLE  ALT=\"9y%2F4%2B4y%2F4=91\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=13y%2F4=91 ALIGN=MIDDLE  ALT=\"13y%2F4=91\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=13y=91%2A4 ALIGN=MIDDLE  ALT=\"13y=91%2A4\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=13y=364 ALIGN=MIDDLE  ALT=\"13y=364\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=364%2F13 ALIGN=MIDDLE  ALT=\"y=364%2F13\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=28 ALIGN=MIDDLE  ALT=\"y=28\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "now go to <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%289%2F4%29y ALIGN=MIDDLE  ALT=\"x+=+%289%2F4%29y\"   DISABLED_style= \"max-width:90%; height:auto;\" >...eq.1........substitute <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=28 ALIGN=MIDDLE  ALT=\"28\"   DISABLED_style= \"max-width:90%; height:auto;\" > for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y ALIGN=MIDDLE  ALT=\"y\"   DISABLED_style= \"max-width:90%; height:auto;\" > and solve for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x ALIGN=MIDDLE  ALT=\"x\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%289%2Fcross%284%29%29cross%2828%297 ALIGN=MIDDLE  ALT=\"x+=+%289%2Fcross%284%29%29cross%2828%297\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+9%2A7 ALIGN=MIDDLE  ALT=\"x+=+9%2A7\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+63 ALIGN=MIDDLE  ALT=\"x+=+63\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "so, there is:\r<BR>\n" );
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document.write( " <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28+63%29 ALIGN=MIDDLE  ALT=\"highlight%28+63%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > string and  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28+28%29 ALIGN=MIDDLE  ALT=\"highlight%28+28%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > wind instruments  \r<BR>\n" );
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document.write( "</TD></TR></TABLE>\n" );