document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=123017>Question 123017</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0495105104/algebrahomeworkh>Algebra for College students</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> I've been working on this problem for a long time but i just can't seem to find the answer could you please help me. thank you.<BR>\n" );
document.write( "Susan's average score for her fist three psychology exams is 84. what must she get on the fourth exam so that her average for the four exams is 85 or better? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #90281 by </B><A HREF=/tutors/aboutme.mpl?userid=rapaljer><B>rapaljer(4671)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rapaljer><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=rapaljer><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=90281\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x = grade on fourth exam\r<BR>\n" );
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document.write( "Mult both sides by 4:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+84%2B84%2B84%2Bx=340 ALIGN=MIDDLE  ALT=\"+84%2B84%2B84%2Bx=340\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=252%2Bx=340 ALIGN=MIDDLE  ALT=\"252%2Bx=340\"   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=340-252=88 ALIGN=MIDDLE  ALT=\"x=340-252=88\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "R^2\r<BR>\n" );
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document.write( "P.S.  An easier way to do this is to realize that if you need an 85 average, and your grades are below 85 by 1 point on each of 3 exams, then you need an 85 on the last test, plus 3 points (to make up the shortfall on the first 3 exams), for a total of 88.\r<BR>\n" );
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