document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=934569>Question 934569</A>: <I><SPAN STYLE=\"word-break: break-all;\"> this is a yes or no question.....\r<BR>\n" );
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document.write( "A car travels a 1-mile track at an average speed of 15 mph. Is it possible for the car to travel the next mile so that the average speed for the 2 mi is 30 mph?\r<BR>\n" );
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document.write( "  thanks so much for the help!!<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #567578 by </B><A HREF=/tutors/aboutme.mpl?userid=DrBeeee><B>DrBeeee(684)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=DrBeeee><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=567578\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Answer: No<BR>\n" );
document.write( "Why, you ask?<BR>\n" );
document.write( "Let's figure it out.<BR>\n" );
document.write( "Let d = rt, with rate r in mph and t in hrs, then d is miles.<BR>\n" );
document.write( "The time to travel the first mile is<BR>\n" );
document.write( "(1) t1 = d/r or<BR>\n" );
document.write( "(2) t1 = 1/15<BR>\n" );
document.write( "Let the rate for the second mile be x, then the time for the second mile is<BR>\n" );
document.write( "(3) t2 = 1/x<BR>\n" );
document.write( "The average speed (rate) for the two miles is<BR>\n" );
document.write( "(4) rave = d/t or<BR>\n" );
document.write( "(5) rave = 2/(t1+t2) or<BR>\n" );
document.write( "(6) rave = 2/(1/15 + 1/x)<BR>\n" );
document.write( "We are asked if rave can be 30mph. Let's see. Can (6) be equal to 30?<BR>\n" );
document.write( "(7) 30 = 2/(1/15 + 1/x) or<BR>\n" );
document.write( "(8) 30 = 2/(x + 15)/(15x) or<BR>\n" );
document.write( "(9) 30 = 30x/(x + 15) or<BR>\n" );
document.write( "(10) 1 = x/(x + 15) or<BR>\n" );
document.write( "(11) (x + 15) = x or<BR>\n" );
document.write( "(12) 15 = 0<BR>\n" );
document.write( "I don't recall that 15 = 0, do you?<BR>\n" );
document.write( "So it is impossible. You need to travel the second mile in zero time. then we have in (5)<BR>\n" );
document.write( "(13) rave = 2/(t1+t2) or <BR>\n" );
document.write( "(14) rave = 2/(1/15+0) or<BR>\n" );
document.write( "(15) rave = 2/(1/15) or<BR>\n" );
document.write( "(16) rave = 30<BR>\n" );
document.write( "It means that we travel at an infinite rate to take zero seconds!<BR>\n" );
document.write( "You're welcome.\r<BR>\n" );
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