document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=817448>Question 817448</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The grading scale for a C in Amy's biology class is an average on tests between 70% and 80%, inclusive. Amy has 64%,84%,and 78%on the first three tests this semester. What range of scores on the fourth test would give her a C? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #492077 by </B><A HREF=/tutors/aboutme.mpl?userid=LinnW><B>LinnW(1048)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=LinnW><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=LinnW><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=492077\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ( 64 + 84 + 78 + x )/4 >= 70 is the equation for obtaining at least a C<BR>\n" );
document.write( "( 226 + x )/4 >= 70<BR>\n" );
document.write( "Multiply each side by 4<BR>\n" );
document.write( "  226 + x >= 70*4<BR>\n" );
document.write( "  226 + x >= 280<BR>\n" );
document.write( "Subtract 226 from each side.<BR>\n" );
document.write( "        x >= 54<BR>\n" );
document.write( "To determine the maximum value of x<BR>\n" );
document.write( "we need to solve<BR>\n" );
document.write( "( 64 + 84 + 78 + x )/4 <= 80<BR>\n" );
document.write( "The rest is left for the student. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );