document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=969347>Question 969347</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Imogene's car traveled 770 mi averaging a certain speed.  If the car has gone 7 mph faster,  the trip would have taken 1 hour less. Find the average speed. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #592250 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=592250\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+ ALIGN=MIDDLE  ALT=\"+s+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = her normal speed in mi/hr<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+%2B+7+ ALIGN=MIDDLE  ALT=\"+s+%2B+7+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = her faster speed in mi/hr<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = her time in hours <BR>\n" );
document.write( "when traveling at <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+ ALIGN=MIDDLE  ALT=\"+s+\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi/hr<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+-+1+ ALIGN=MIDDLE  ALT=\"+t+-+1+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = her time in hours when<BR>\n" );
document.write( "traveling at <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+%2B+7+ ALIGN=MIDDLE  ALT=\"+s+%2B+7+\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi/hr<BR>\n" );
document.write( "----------------------------------<BR>\n" );
document.write( "Equation for traveling at normal speed<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+770+=+s%2At+ ALIGN=MIDDLE  ALT=\"+770+=+s%2At+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Equation for traveling at faster speed<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+770+=+%28+s%2B7+%29%2A%28+t+-+1+%29+ ALIGN=MIDDLE  ALT=\"+770+=+%28+s%2B7+%29%2A%28+t+-+1+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+770+=+s%2At+%2B+7t+-+s+-+7+ ALIGN=MIDDLE  ALT=\"+770+=+s%2At+%2B+7t+-+s+-+7+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+770%2Ft+ ALIGN=MIDDLE  ALT=\"+s+=+770%2Ft+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+770+=+%28+770%2Ft+%29%2At+%2B+7t+-+770%2Ft+-+7+ ALIGN=MIDDLE  ALT=\"+770+=+%28+770%2Ft+%29%2At+%2B+7t+-+770%2Ft+-+7+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+770+=+770+%2B+7t+-+770%2Ft+-+7+ ALIGN=MIDDLE  ALT=\"+770+=+770+%2B+7t+-+770%2Ft+-+7+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+0+=+7t+-+770%2Ft+-+7+ ALIGN=MIDDLE  ALT=\"+0+=+7t+-+770%2Ft+-+7+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+770%2Ft++=+7t+-+7+ ALIGN=MIDDLE  ALT=\"+770%2Ft++=+7t+-+7+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+770+=+7t%5E2+-+7t+ ALIGN=MIDDLE  ALT=\"+770+=+7t%5E2+-+7t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+7t%5E2+-+7t+-+770+=+0+ ALIGN=MIDDLE  ALT=\"+7t%5E2+-+7t+-+770+=+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t%5E2+-+t+-+110+=+0+ ALIGN=MIDDLE  ALT=\"+t%5E2+-+t+-+110+=+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+t+-+11+%29%2A%28+t+%2B+10+%29+ ALIGN=MIDDLE  ALT=\"+%28+t+-+11+%29%2A%28+t+%2B+10+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > ( by looking at it )<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+11+ ALIGN=MIDDLE  ALT=\"+t+=+11+\"   DISABLED_style= \"max-width:90%; height:auto;\" > ( time must be positive )<BR>\n" );
document.write( "and<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+770%2Ft+ ALIGN=MIDDLE  ALT=\"+s+=+770%2Ft+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+770%2F11+ ALIGN=MIDDLE  ALT=\"+s+=+770%2F11+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+70+ ALIGN=MIDDLE  ALT=\"+s+=+70+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "the average speed is 70 mi/hr<BR>\n" );
document.write( "-----------------------------<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+770+=+%28+s%2B7+%29%2A%28+t+-+1+%29+ ALIGN=MIDDLE  ALT=\"+770+=+%28+s%2B7+%29%2A%28+t+-+1+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+770+=+%28+70%2B7+%29%2A%28+11+-+1+%29+ ALIGN=MIDDLE  ALT=\"+770+=+%28+70%2B7+%29%2A%28+11+-+1+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+770+=+77%2A10+ ALIGN=MIDDLE  ALT=\"+770+=+77%2A10+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+770+=+770+ ALIGN=MIDDLE  ALT=\"+770+=+770+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );