document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=782492>Question 782492</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The average (arithmetic mean) of r, s, x and y is 8, and the average of x and y is 4. what is the average of r and s?\r<BR>\n" );
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document.write( "a)4<BR>\n" );
document.write( "b) 6<BR>\n" );
document.write( "c) 8<BR>\n" );
document.write( "d) 12   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #476401 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=476401\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The average (arithmetic mean) of r, s, x and y is 8, \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28r%2Bs%2Bx%2By%29%2F4=8 ALIGN=MIDDLE  ALT=\"%28r%2Bs%2Bx%2By%29%2F4=8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%2Bs%2Bx%2By=32 ALIGN=MIDDLE  ALT=\"r%2Bs%2Bx%2By=32\"   DISABLED_style= \"max-width:90%; height:auto;\" >.......eq.1<BR>\n" );
document.write( "and the average of x and y is 4<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%2By%29%2F2=4 ALIGN=MIDDLE  ALT=\"%28x%2By%29%2F2=4\"   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=%28x%2By%29=8 ALIGN=MIDDLE  ALT=\"%28x%2By%29=8\"   DISABLED_style= \"max-width:90%; height:auto;\" >.....eq.2..substitute in eq.1\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%2Bs%2B%28x%2By%29=32 ALIGN=MIDDLE  ALT=\"r%2Bs%2B%28x%2By%29=32\"   DISABLED_style= \"max-width:90%; height:auto;\" >.......eq.1\r<BR>\n" );
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document.write( " <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%2Bs%2B%288%29=32 ALIGN=MIDDLE  ALT=\"r%2Bs%2B%288%29=32\"   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=r%2Bs+=32-8 ALIGN=MIDDLE  ALT=\"r%2Bs+=32-8\"   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=r%2Bs+=24 ALIGN=MIDDLE  ALT=\"r%2Bs+=24\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "the arithmetic mean  will be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28r%2Bs%29%2F2+=12 ALIGN=MIDDLE  ALT=\"%28r%2Bs%29%2F2+=12\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "so, your answer is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d ALIGN=MIDDLE  ALT=\"d\"   DISABLED_style= \"max-width:90%; height:auto;\" >) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12 ALIGN=MIDDLE  ALT=\"12\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "   </SPAN>\n" );
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