document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1160242>Question 1160242</A>: <I><SPAN STYLE=\"word-break: break-all;\"> David and Andrew are traveling to a Mathematics conference. David travels 110 miles in <BR>\n" );
document.write( "the same time that Andrew travels 140 miles. Andrew travels 15 miles per hour faster <BR>\n" );
document.write( "than David. Find the average rate of each person.<BR>\n" );
document.write( "� </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #783502 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=783502\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> David and Andrew are traveling to a Mathematics conference. David travels 110 miles in <BR>\n" );
document.write( "the same time that Andrew travels 140 miles. Andrew travels 15 miles per hour faster <BR>\n" );
document.write( "than David. Find the average rate of each person.<BR>\n" );
document.write( "======================================<BR>\n" );
document.write( "d = r*t<BR>\n" );
document.write( "The times are the same.<BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "t = d/r<BR>\n" );
document.write( "t = 110/r = 140/(r+15)<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Cross multiply<BR>\n" );
document.write( "110(r+15) = 140r<BR>\n" );
document.write( "110r + 1650 = 140r<BR>\n" );
document.write( "1650 = 30r<BR>\n" );
document.write( "r = 55<BR>\n" );
document.write( "etc </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );