document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=170453>Question 170453</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0321269470/algebrahomeworkh>Introductory Algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Solve the problem. Karin biked at 13 mph for a time but got a flat tire. She then walked at 5 mph. She traveled a total of 93 miles. Had she biked the whole time, she would have gone 117 miles. How many hours did she walk? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #125859 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=125859\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Karin biked at 13 mph for a time but got a flat tire. She then walked at 5 mph.<BR>\n" );
document.write( " She traveled a total of 93 miles. Had she biked the whole time, she would have<BR>\n" );
document.write( " gone 117 miles.<BR>\n" );
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document.write( "How many hours did she walk?<BR>\n" );
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document.write( "We know that if she biked the whole way, travel time would be: 117/13 = 9 hrs<BR>\n" );
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document.write( "This is also the travel time of walking and riding a total of 93 mi, implied by<BR>\n" );
document.write( "the phrase.\"Had she biked the whole time\"<BR>\n" );
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document.write( "Find the distance she walked, first.\r<BR>\n" );
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document.write( "Let d = distance walked<BR>\n" );
document.write( "Then<BR>\n" );
document.write( "(93-d) = distance she rode<BR>\n" );
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document.write( "Write a time equation: Time = dist/speed:<BR>\n" );
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document.write( "walking time + riding time = 9 hrs<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F5 ALIGN=MIDDLE  ALT=\"d%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%2893-d%29%29%2F13 ALIGN=MIDDLE  ALT=\"%28%2893-d%29%29%2F13\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 9<BR>\n" );
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document.write( "Multiply equation by 65 to get rid of the denominators, results:<BR>\n" );
document.write( "13d + 5(93-d) = 65(9)<BR>\n" );
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document.write( "13d + 465 - 5d = 585<BR>\n" );
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document.write( "13d - 5d = 585 - 465<BR>\n" );
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document.write( "8d = 120<BR>\n" );
document.write( "d = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=120%2F8 ALIGN=MIDDLE  ALT=\"120%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "d = 15 miles walked<BR>\n" );
document.write( "the<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=15%2F5 ALIGN=MIDDLE  ALT=\"15%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 3 hrs walking<BR>\n" );
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document.write( "Check solution, find the distance riding:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2893-15%29%2F13 ALIGN=MIDDLE  ALT=\"%2893-15%29%2F13\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 6 hr<BR>\n" );
document.write( "so we have: 3 + 6 hrs = 9 hrs\r<BR>\n" );
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document.write( " </SPAN>\n" );
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