document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=181743>Question 181743</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Method of Substitution<BR>\n" );
document.write( "11. Pietro needs to rent a truck for 1 day. He calls two rental companies to compare costs. Joe's Garage charges $80 for the day plus $0.22/km. Ace Trucks charges $100/day and $0.12/km. Under what circcumstances do the two companies charge the same amount? When would it be better for Pietro to rent from Joe's Garage. <BR>\n" );
document.write( "Thank you very much and i need it today please. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #136343 by </B><A HREF=/tutors/aboutme.mpl?userid=Mathtut><B>Mathtut(3670)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Mathtut><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=136343\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Method of Substitution<BR>\n" );
document.write( "11. Pietro needs to rent a truck for 1 day. He calls two rental companies to compare costs. Joe's Garage charges $80 for the day plus $0.22/km. Ace Trucks charges $100/day and $0.12/km. Under what circcumstances do the two companies charge the same amount? When would it be better for Pietro to rent from Joe's Garage. <BR>\n" );
document.write( "Thank you very much and i need it today please.<BR>\n" );
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document.write( "1)Joes: C=.22(k)+80.......where C is the cost and k is the km driven<BR>\n" );
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document.write( "Ace: C=.12(k)+100.........where C is the cost and k is the km driven<BR>\n" );
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document.write( "2)for joe to be equal to Ace we just set the equations equal and solve for k<BR>\n" );
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document.write( ".12(k)+100=.22(k)+80<BR>\n" );
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document.write( ".1k=20<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28k=200%29 ALIGN=MIDDLE  ALT=\"highlight%28k=200%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >km.......this is the amount of kilometers that makes the costs equal<BR>\n" );
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document.write( "3) now we are looking for Joe < Ace<BR>\n" );
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document.write( "which we write as .22k+80<.12k+100<BR>\n" );
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document.write( ".1k<20<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28k%3C200%29 ALIGN=MIDDLE  ALT=\"highlight%28k%3C200%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >km.....so as long as kilometers stay under 200 Joe will be the cheaper cost. they are equal at 200 and over 200km Ace will be the lower cost </SPAN>\n" );
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