document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=881831>Question 881831</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boy walks 7 km west,then 4 km north,and finally 4 km east.How far is he from his  starting point?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #532521 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=532521\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> he travels west 7 km then north 4km the n east 4 km.<BR>\n" );
document.write( "if he started at the coordinate point of (0,0), then his travels would take him to:<BR>\n" );
document.write( "(-7,0) when he goes west.<BR>\n" );
document.write( "(-7,4) when he goes north.<BR>\n" );
document.write( "(-3,4) when he goes east.<BR>\n" );
document.write( "he started at (0,0) and ended at (-3,4)<BR>\n" );
document.write( "the distance between (0,0) and (-3,4) is equal to:<BR>\n" );
document.write( "sqrt((4-0)^2 + (-3-0)^2) which is equal to:<BR>\n" );
document.write( "sqrt(4^2 + (-3)^2) which is equal to:<BR>\n" );
document.write( "sqrt(16 + 9) which is equal to:<BR>\n" );
document.write( "sqrt(25) which is equal to 5.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );