document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=135537>Question 135537</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0201812487/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> A student walks and jogs to college each day.  The student averages 5km/h walking and 9km/h jogging.  The distance from home to college is 8km, and the student makes the trip in 1 hour. 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 #99311 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=99311\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A student walks and jogs to college each day. The student averages 5km/h walking and 9km/h jogging. The distance from home to college is 8km, and the student makes the trip in 1 hour. How far does the student jog?<BR>\n" );
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document.write( "Let x = distance jogged<BR>\n" );
document.write( "then<BR>\n" );
document.write( "(8-x) = distance walked:<BR>\n" );
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document.write( "Write a time equation: Time = dist/speed<BR>\n" );
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document.write( "Walk time + jog time = 1 hr<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%288-x%29%29%2F5 ALIGN=MIDDLE  ALT=\"%28%288-x%29%29%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2F9 ALIGN=MIDDLE  ALT=\"x%2F9\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 1<BR>\n" );
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document.write( "Multiply equation by 45 to get rid of the denominators<BR>\n" );
document.write( "45*<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%288-x%29%29%2F5 ALIGN=MIDDLE  ALT=\"%28%288-x%29%29%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" > + 45*<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2F9 ALIGN=MIDDLE  ALT=\"x%2F9\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 45(1)<BR>\n" );
document.write( "9(8-x) + 5x = 45<BR>\n" );
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document.write( "72 - 9x + 5x = 45<BR>\n" );
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document.write( "-4x = 45 - 72<BR>\n" );
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document.write( "-4x = -27<BR>\n" );
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document.write( "x = -27/-4<BR>\n" );
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document.write( "x = 6.75 km jogged<BR>\n" );
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document.write( "Check solution: 8 - 6.75 = 1.25 km walked; check using the time equation<BR>\n" );
document.write( "1.25/5 + 6.75/9 =<BR>\n" );
document.write( ".25 + .75 = 1 </SPAN>\n" );
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