document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=851214>Question 851214</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me with this question!!!! The number of seats in the first 12 rows of a high school auditorium form an arithmetic sequence. The first row has 9 seats. The second row has 11 seats. A) write a recursive formula to represent the sequence. B) write an explicit formula to represent the sequence. C) how many seats are in the 12th row?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #512635 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=512635\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a) an=a(n-1)+2<BR>\n" );
document.write( "b) an=9+(n-1)2<BR>\n" );
document.write( "an=9+2n-2<BR>\n" );
document.write( "an=2n+7<BR>\n" );
document.write( "c) a12=24+7=31<BR>\n" );
document.write( "first five 9,11,13,15,17,<BR>\n" );
document.write( "rows (6-12) 19,21,23,25,27,29,31<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );