document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=114273>Question 114273</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0131314149/algebrahomeworkh>algebra 1</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\">  1. define a variable and write an equation to model each situation. then solve.\r<BR>\n" );
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document.write( "the rate to rent a certain truck is $55 per day and 20 cents per mile. your family pays $80 to rent this truck for one day. how many miles did your family drive?\r<BR>\n" );
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document.write( "2. 9j+3=3[3j+1]\r<BR>\n" );
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document.write( "3. 1 over four[k-1]=10\r<BR>\n" );
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document.write( "4. 5n+1/over 8=1/2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #83163 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=83163\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> One problem per question.\r<BR>\n" );
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document.write( "To model this situation in general you need three variables, C to represent the total rate or cost (this is the dependent variable), d to represent the number of days the truck was rented, and m to represent the number of miles driven.  (d and m are independent variables).\r<BR>\n" );
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document.write( "Let's translate the words into symbols:\r<BR>\n" );
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document.write( "The rate (C) is (=) $55 per day (55d) and (+) $0.20 per mile (.2m), or putting it all together:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C=55d%2B.2m ALIGN=MIDDLE  ALT=\"C=55d%2B.2m\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "(Do you understand why I used $0.20 to represent 20 cents?  If not, write me a note)\r<BR>\n" );
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document.write( "In your situation, you are given that C = $80, and that d = 1 day.  So we can write:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=80=55%2A1%2B.2m ALIGN=MIDDLE  ALT=\"80=55%2A1%2B.2m\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now solve:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=.2m=80-55 ALIGN=MIDDLE  ALT=\".2m=80-55\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=.2m=25 ALIGN=MIDDLE  ALT=\".2m=25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m=125 ALIGN=MIDDLE  ALT=\"m=125\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "So the family drove the truck 125 miles.\r<BR>\n" );
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document.write( "Last step -- VERY IMPORTANT, Check your answer.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=55%2A1%2B.2%2A125=55%2B25=80 ALIGN=MIDDLE  ALT=\"55%2A1%2B.2%2A125=55%2B25=80\"   DISABLED_style= \"max-width:90%; height:auto;\" >Check!  \r<BR>\n" );
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document.write( "Hope that helps,<BR>\n" );
document.write( "John </SPAN>\n" );
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