document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=720399>Question 720399</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If Edna leaves now and drives at 30 mi/h, she can reach Athens just in time for her night class. On the other hand, if she eats a snack and leaves in 20 min, she has to drive 45 mi/h ti make it to her class on time. How far away is Athens?\r<BR>\n" );
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document.write( "I do not even know how to set this problem up.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #441813 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=441813\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  If Edna leaves now and drives at 30 mi/h, she can reach Athens just in time for her night class.<BR>\n" );
document.write( " On the other hand, if she eats a snack and leaves in 20 min, she has to drive 45 mi/h ti make it to her class on time.<BR>\n" );
document.write( " How far away is Athens?<BR>\n" );
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document.write( "Change 20 min to 1/3 hr<BR>\n" );
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document.write( "Let d = distance to the class<BR>\n" );
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document.write( "Write a time equation<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F30 ALIGN=MIDDLE  ALT=\"d%2F30\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F45 ALIGN=MIDDLE  ALT=\"d%2F45\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F3 ALIGN=MIDDLE  ALT=\"1%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "multiply by 90 to clear the denominators<BR>\n" );
document.write( "3d = 2d + 30<BR>\n" );
document.write( "3d - 2d = 30<BR>\n" );
document.write( "d = 30 mi to class<BR>\n" );
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document.write( "Check this; find the driving time at each speed<BR>\n" );
document.write( "30/30 = 1 hr to get to class on time<BR>\n" );
document.write( "30/45 = 2/3 hrs which allows 1/3 hr for a snack\r<BR>\n" );
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