document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=292648>Question 292648</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Sarah has gotten scores of 83, 76, and 69 on her first three tests. What score must she get on her fourth test to keep an average of 81 or greater?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #211362 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=211362\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (83+76+69+x)/4>=81<BR>\n" );
document.write( "(228+x)/4>=81<BR>\n" );
document.write( "228+x>=4*81<BR>\n" );
document.write( "228+x>=324<BR>\n" );
document.write( "x>=324-228<BR>\n" );
document.write( "x>=96 ans. for the minimum grade on the fourth test to maintain the 81 ave.<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( "Let x=96<BR>\n" );
document.write( "(83+76+69+96)/4>=81<BR>\n" );
document.write( "324/4=81<BR>\n" );
document.write( "81=81 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );