document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=184227>Question 184227</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0321269470/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> A student walks and jogs to college each day.  She averages 5 km/h walking and 9km/h jogging.  The distance from home to college is 8 km, and she makes the trip in 1 hr.  How far does the student jog? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #138259 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=138259\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A student walks and jogs to college each day. She averages 5 km/h walking and 9km/h jogging. The distance from home to college is 8 km, and she makes the trip in 1 hr. How far does the student jog?<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "Walking DATA:<BR>\n" );
document.write( "distance = x km ; rate = 5 km/h ; time = d/r = x/5 hr<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "Jogging DATA:<BR>\n" );
document.write( "distance = (8-x) km ; rate = 9 km/h ; time = (8-x)/9 hr \r<BR>\n" );
document.write( "\n" );
document.write( "=============<BR>\n" );
document.write( "Equation<BR>\n" );
document.write( "time + time = 1 hr<BR>\n" );
document.write( "x/5 + (8-x)/9 = 1\r<BR>\n" );
document.write( "\n" );
document.write( "Multiply thru by 45 to get:<BR>\n" );
document.write( "9x + 5(8-x) = 45<BR>\n" );
document.write( "9x + 40 - 5x = 45<BR>\n" );
document.write( "4x = 5<BR>\n" );
document.write( "x = 5/4 km (walking distance<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "8-x = 8 -5/4 = 27/4 km (jogging distance)<BR>\n" );
document.write( "=================================================<BR>\n" );
document.write( "Cheers<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );