document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=722812>Question 722812</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Susan Jacobson has grades of 76 and 81 on her first two algebra tests. If she wants an average of at least 80 after her third test, what score must she make on that test? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #442916 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><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=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=442916\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x ALIGN=MIDDLE  ALT=\"x\"   DISABLED_style= \"max-width:90%; height:auto;\" >= grade for the third test.<BR>\n" );
document.write( "For the average after the third test to be 80, the sum of all 3 test grades divided by 3 must be 80.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=average=%2876%2B81%2Bx%29%2F3=80 ALIGN=MIDDLE  ALT=\"average=%2876%2B81%2Bx%29%2F3=80\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiplying both sides of the equal sign times 3, we get<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=76%2B81%2Bx=80%2A3 ALIGN=MIDDLE  ALT=\"76%2B81%2Bx=80%2A3\"   DISABLED_style= \"max-width:90%; height:auto;\" > --> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=157%2Bx=240 ALIGN=MIDDLE  ALT=\"157%2Bx=240\"   DISABLED_style= \"max-width:90%; height:auto;\" > --> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=240-57 ALIGN=MIDDLE  ALT=\"x=240-57\"   DISABLED_style= \"max-width:90%; height:auto;\" > --> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28x=83%29 ALIGN=MIDDLE  ALT=\"highlight%28x=83%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "That is probably the expected answer.<BR>\n" );
document.write( " <BR>\n" );
document.write( "However, in real life, thanks to rounding, Susan could get away with an 82, because<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=76%2B81%2B82%29%2F3=235%2F3=79%262%2F3 ALIGN=MIDDLE  ALT=\"76%2B81%2B82%29%2F3=235%2F3=79%262%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" > and that rounds up to 80. </SPAN>\n" );
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