document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=109391>Question 109391</A>: <I><SPAN STYLE=\"word-break: break-all;\"> This is not in a textbook it's in a Math Student workbook made up by my university.<BR>\n" );
document.write( "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<BR>\n" );
document.write( "Jennie drives to her son's house in 5 hours when there is heavy traffic. When there is no traffic, the same trip takes 4 hours. She can drive an average of 12 m.p.h. faster when there is no traffic than when thereis heavy traffic.\r<BR>\n" );
document.write( "\n" );
document.write( "What is her average speed when there is no traffic?\r<BR>\n" );
document.write( "\n" );
document.write( "What is the distance from her house to her son's house? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #79769 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=79769\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Jennie drives to her son's house in 5 hours when there is heavy traffic. When there is no traffic, the same trip takes 4 hours. She can drive an average of 12 m.p.h. faster when there is no traffic than when there is heavy traffic.<BR>\n" );
document.write( ":<BR>\n" );
document.write( "What is her average speed when there is no traffic?<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Let s = Av speed, no traffic<BR>\n" );
document.write( "Then<BR>\n" );
document.write( "(s-12) = Av speed in traffic<BR>\n" );
document.write( ":<BR>\n" );
document.write( "The distance for both situations is given as the same:<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Write a distance equation: Distance = time * speed<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Dist traffic = Dist no traffic<BR>\n" );
document.write( "5(s-12) = 4s<BR>\n" );
document.write( "5s - 60 = 4s<BR>\n" );
document.write( "5s - 4s = +60<BR>\n" );
document.write( "s = 60 mph no traffic<BR>\n" );
document.write( "and<BR>\n" );
document.write( "60 - 12 = 48 mph in traffic<BR>\n" );
document.write( ":<BR>\n" );
document.write( ":<BR>\n" );
document.write( "What is the distance from her house to her son's house?<BR>\n" );
document.write( "5(48) = 240 miles<BR>\n" );
document.write( "and<BR>\n" );
document.write( "4(60) = 240 miles </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );