document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1173732>Question 1173732</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The sum of 8terms on AP is 160 while the sum of 20 terms is 880 find <BR>\n" );
document.write( "The 43rd tert <BR>\n" );
document.write( "The sum of 12 terms<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #799051 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=799051\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Sn=(n/2)(2a+(n-1)d)<BR>\n" );
document.write( "160=4(2a+7d)<BR>\n" );
document.write( "2a+7d=40<BR>\n" );
document.write( "and<BR>\n" );
document.write( "880=10(2a+19d)<BR>\n" );
document.write( "2a+19d=88<BR>\n" );
document.write( "12d=48 subtracting top from bottom<BR>\n" );
document.write( "d=4<BR>\n" );
document.write( "that makes a=6<BR>\n" );
document.write( "6/10/14/18/22/26/30/34=160<BR>\n" );
document.write( "sun of 12 terms is<BR>\n" );
document.write( "S12+6(12+4(11))=336<BR>\n" );
document.write( "160+38+42+46=50=336<BR>\n" );
document.write( "-<BR>\n" );
document.write( "43rd term is a+(n-1)d=6+(42)*4<BR>\n" );
document.write( "=174<BR>\n" );
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document.write( "</TD></TR></TABLE>\n" );