document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=908176>Question 908176</A>: <I><SPAN STYLE=\"word-break: break-all;\"> efren leaves home at 9 am and walks 4 miles per hour. his brother, Gregory leaves half an hour later and runs 8.5 miles per hour in the same direction. predict the time at which Gregory will catch up to efron. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #550938 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=550938\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Gaining speed 8.5 -4= 4.5 mph<BR>\n" );
document.write( "Headstart 4*0.5 =2 miles<BR>\n" );
document.write( "Time to catch up 2/4.5=0.44444444 hours<BR>\n" );
document.write( "Time to catch up =26.6666667 minutes<BR>\n" );
document.write( "Algebraic solution<BR>\n" );
document.write( "4(t+0.5)=8.5t<BR>\n" );
document.write( "4t+2.0=8.5t<BR>\n" );
document.write( "2.0=8.5t-4t<BR>\n" );
document.write( "2.0=4.5t<BR>\n" );
document.write( "t=0.44444444  hours </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );