document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=987847>Question 987847</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The perimeter of a rectangle is 28cm. The length x, is 8cm more than the width, Y. Write two equations that could be used to solve the system. Solve for Y and Graph.   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #608553 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=608553\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A concert hall has 100 seats in the first row, 102 seats in the second row, 104 in the third row, and so on. The last row has 168 seats.<BR>\n" );
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document.write( "Arithmetic series with a(1) = 100 and d = 2<BR>\n" );
document.write( "Find \"n\"::<BR>\n" );
document.write( "a(n) = 2 + (n-1)2 = 168<BR>\n" );
document.write( "(n-1)2 = 166<BR>\n" );
document.write( "n-1 = 84<BR>\n" );
document.write( "n = 85<BR>\n" );
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document.write( "a) how many total rows does the concert hall have?<BR>\n" );
document.write( "Ans:: 85<BR>\n" );
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document.write( "B) how many seats does the concert hall have?<BR>\n" );
document.write( "S(85) = (85/2)(100 + 168) = 11390<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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