document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1207881>Question 1207881</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Commonwealth Edison Company supplies electricity to residential customers for a monthly customer charge of $10.55 plus 9.44 cents per kilowatt-hour for up to 600 kilowatt-hours.\r<BR>\n" );
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document.write( "(a)  Write a linear equation that relates the monthly charge C,in dollars, to the number x of kilowatt-hours used in a month, 0 <= x <= 600.\r<BR>\n" );
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document.write( "My equation is C(x) = 9.44x + 10.55, where x = the number of kilowatt-hours. However, the book's equation is C(x) = 0.0944x + 10.55. \r<BR>\n" );
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document.write( "Tell me, where did 0.0944 come from in the book's equation? \r<BR>\n" );
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document.write( "(b) Graph this equation. \r<BR>\n" );
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document.write( "I don't know how to upload pictures on this website. \r<BR>\n" );
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document.write( "(c) What is the monthly charge for using 200 kilowatt-hours?\r<BR>\n" );
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document.write( "For (c), I must let x = 200 in the equation. Yes? \r<BR>\n" );
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document.write( "(d) What is the monthly cost for using 500 kilowatt-hours?\r<BR>\n" );
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document.write( "For (d), I must let x = 500 in the equation. Yes?\r<BR>\n" );
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document.write( "(e) What is the monthly charge for using 700 kilowatt-hours?\r<BR>\n" );
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document.write( "I see that 700 falls outside the given range [0, 600].<BR>\n" );
document.write( "So, it cannot be determined.  Yes? \r<BR>\n" );
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document.write( "(f) Interpret the slope of the line.\r<BR>\n" );
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document.write( "Let x = number of kilowatt-hours \r<BR>\n" );
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document.write( "So, each x used adds $0.0944 to the bill. \r<BR>\n" );
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document.write( "You say? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #846009 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52788)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=846009\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "<PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">\r\n" );
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document.write( "Your equation  C(x) = 9.44x + 10.55  dollars  is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28highlight%28incorrect%29%29 ALIGN=MIDDLE  ALT=\"highlight%28highlight%28incorrect%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r\n" );
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document.write( "The correct equation is\r\n" );
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document.write( "    C(x) = 0.0944x + 10.55  dollars.\r\n" );
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document.write( "The coefficient 0.0944  is the rate  9.44 cents per kilowatt-hour <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28highlight%28converted%29%29 ALIGN=MIDDLE  ALT=\"highlight%28highlight%28converted%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > to <U>dollars</U> per kilowatt-hour.\r\n" );
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document.write( "Conversion is needed to have all the terms (all the numbers) of the equation in consistent units.\r\n" );
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document.write( "So, all your following calculations must be redone.\r\n" );
document.write( "</PRE>\r<BR>\n" );
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document.write( "Solved, answered and explained, in full.\r<BR>\n" );
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document.write( "///////////////////\r<BR>\n" );
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document.write( "Similar problem (a TWIN) was solved at this forum couple of days ago under the link\r<BR>\n" );
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document.write( "https://www.algebra.com/algebra/homework/Graphs/Graphs.faq.question.1207854.html\r<BR>\n" );
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document.write( "with complete explanations.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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