document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=864515>Question 864515</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Dominoes are stacked on top of each other such that the first row contains 80, the 2nd row 78, etc so that each row contains 2 fewer dominoes than the previous row. If the number of dominoes in the pile totals 710, how many rows are there in the stack? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #521042 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=521042\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S%5Bn%5D=+%28n%2F2%29%282%2Aa%5B1%5D%2B+%28n-1%29d%29 ALIGN=MIDDLE  ALT=\"S%5Bn%5D=+%28n%2F2%29%282%2Aa%5B1%5D%2B+%28n-1%29d%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S%5Bn%5D=+%28n%2F2%29%28160%2B+%28n-1%292%29+=+710 ALIGN=MIDDLE  ALT=\"S%5Bn%5D=+%28n%2F2%29%28160%2B+%28n-1%292%29+=+710\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S%5Bn%5D=+%28n%2F2%29%282n+%2B+158%29+=+710 ALIGN=MIDDLE  ALT=\"S%5Bn%5D=+%28n%2F2%29%282n+%2B+158%29+=+710\"   DISABLED_style= \"max-width:90%; height:auto;\" >  <BR>\n" );
document.write( "        n^2 + 79n - 710 = 0  Check Your numbers<BR>\n" );
document.write( "         </SPAN>\n" );
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