document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=330237>Question 330237</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can someone please walk me through this?\r<BR>\n" );
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document.write( "Plastic pipe is stacked so that the bottom row has 25 pipes, the next row has 24 pipes, the next row has 23 pipes, and so on until there is 1 pipe at the top of the stack. If a worker removes the top 17 rows of pipe, how many pieces of pipe will be left in the stack?<BR>\n" );
document.write( "___ pieces of pipe \r<BR>\n" );
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document.write( "Thank you,<BR>\n" );
document.write( "Edgar </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #236676 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=236676\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font face=\"Garamond\" size=\"+2\">\r<BR>\n" );
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document.write( "The sum of a series of numbers is equal to the sum of the first number and the last number multiplied by the number of numbers and the product divided by 2.\r<BR>\n" );
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document.write( "For your problem, if they removed the first 17 rows of pipe, the first number in your series becomes 18.  The last is 24.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ \frac{(a\ +\ l)n}{2}\ =\ \frac{(18\ +\ 24)\ \cdot\ 7}{2}\">\r<BR>\n" );
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document.write( "You can do your own arithmetic -- and you should be able to do it in your head.\r<BR>\n" );
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document.write( "John<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE e^{i\pi} + 1 = 0\"><BR>\n" );
document.write( "My calculator said it, I believe it, that settles it<BR>\n" );
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