document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=22927>Question 22927</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Amy travels 450 miles at a certain speed. If the car had gone 15mph faster, the trip would have taken one hour less. Find Amy's speed.<BR>\n" );
document.write( "A. 78 mph<BR>\n" );
document.write( "B. 75 mph<BR>\n" );
document.write( "C. 68 mph<BR>\n" );
document.write( "D. 72 mph </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #11420 by </B><A HREF=/tutors/aboutme.mpl?userid=venugopalramana><B>venugopalramana(3286)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=venugopalramana><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.geocities.com/venugopalramana/FREE_MATHS_ASSISTANCE.html valign=middle><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=11420\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> LET AMY'S SPEED BE X MPH….TIME TO TRAVEL 450 MILES=450/X HRS.<BR>\n" );
document.write( "IF CAR GOES 15 MPH FASTER SPEED = X+15…..TIME TO TRAVEL=450/(X+15)<BR>\n" );
document.write( "THIS TIME IS 1 HOUR LESS.SO…450/X-450/(X+15)=1…MULTIPLYING BY LCM X(X+15)<BR>\n" );
document.write( "450{X+15-X)=X(X+15)=450*15=6750=X^2+15X<BR>\n" );
document.write( "X^2+15X-6750=0=X^2+90X-75X-6750=X(X+90)-75(X+90)=(X-75)(X+90).HENCE X=75….B IS THE ANSWER.<BR>\n" );
document.write( "INCIDENTALLY I GOT THROUGH YAHOO 360 A MESSAGE REQUESTING HELP TO YOU FROM YOUR FATHER .I REPLIED IN AFFIRMATIVE TO YAHOO 360 AS I COULD NOT REPLY DIRECTLY O YOUR FATHER A I DONT HAVE HE  MAIL ADDRESS.IF YOU GIVE THE ADDRES I CAN CLARIFY BYOUR OTHER DOUBTS TOO. </SPAN>\n" );
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