document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=286457>Question 286457</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A student would like to have an average grade of 90 for 4 exams. His first 3 tests were 88, 79 and 94. What does he have to get on his 4th exam to get that 90 average? X is supposed to be the student's 4th exam score. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #207767 by </B><A HREF=/tutors/aboutme.mpl?userid=texttutoring><B>texttutoring(324)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=texttutoring><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=texttutoring><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=207767\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let s1=score 1, s2=score 2, s3=score 3, and x=the unknown score\r<BR>\n" );
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document.write( "The formula for average is:\r<BR>\n" );
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document.write( "Avg = (s1+s2+s3+x)/4<BR>\n" );
document.write( "90= (88+79+94+x)/4\r<BR>\n" );
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document.write( "360=261+x<BR>\n" );
document.write( "x=99\r<BR>\n" );
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document.write( "He would have to get 99 on his 4th exam in order to get 90 average. </SPAN>\n" );
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