document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=925570>Question 925570</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Manuel's quiz scores in history are 76, 81, and 77. What score must he get on his fourth quiz to have an average of at least 80? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #561604 by </B><A HREF=/tutors/aboutme.mpl?userid=wrodriguez50><B>wrodriguez50(1)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=wrodriguez50><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=wrodriguez50><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=561604\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Given: 76, 81, 77<BR>\n" );
document.write( "Solve for Avg >= 80\r<BR>\n" );
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document.write( "The variable \"x\" is Manuel's score on the fourth quiz\r<BR>\n" );
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document.write( "(76 + 81 + 77 + x)/4 >= 80\r<BR>\n" );
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document.write( "Multiply both sides by 4 to get rid of the fraction\r<BR>\n" );
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document.write( "76 + 81 + 77 + x >= 320\r<BR>\n" );
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document.write( "Combine like terms\r<BR>\n" );
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document.write( "234 + x >= 320\r<BR>\n" );
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document.write( "Subtract both sides by 234 to get \"x\" alone\r<BR>\n" );
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document.write( "234 - 234 + x >= 320 - 234\r<BR>\n" );
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document.write( "X >= 86\r<BR>\n" );
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document.write( "Therefore, Manuel needs to score 86 or better on his next quiz to have an average of at least 80.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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