document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1003717>Question 1003717</A>: <I><SPAN STYLE=\"word-break: break-all;\"> One phone company advertises a flat rate of $0.07 per minute for long-distance calls. Your long-distance plan charges $5.00 per month plus a rate of $0.05 per minute. How many minutes do you have to talk each month so that your average cost is less than $0.07 per minute? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #620407 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=620407\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x = number of minutes.<BR>\n" );
document.write( "you equation is 5 + .05*x < .07*x\r<BR>\n" );
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document.write( "subtract .05*x from both sides of this equation to get 5 < .07*x - .05*x.\r<BR>\n" );
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document.write( "simplify this to get 5 < .02*x\r<BR>\n" );
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document.write( "divide both sides of this equation by .02 to get 5/.02 < x\r<BR>\n" );
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document.write( "solve for x to get 250 < x\r<BR>\n" );
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document.write( "this is the same as x > 250.\r<BR>\n" );
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document.write( "your cost per call will be less than 7 cents a call when the number of calls is greater than 250.\r<BR>\n" );
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document.write( "for example:\r<BR>\n" );
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document.write( "when x = 200, 5 + .05*x = 5 + 10 = 15 / 200 = .075 per call.\r<BR>\n" );
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document.write( "when x = 250, 5 + .05*250 = 5 + 12.5 = 17.5 / 250 = .07 per call.\r<BR>\n" );
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document.write( "when x = 300, 5 + .05*300 = 5 + 15 = 20 / 300 = .067 per call.\r<BR>\n" );
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document.write( "any number of calls less than 250 results in a cost per call greater than .07<BR>\n" );
document.write( "250 calls results in a cost per call exactly equal to .07.<BR>\n" );
document.write( "any number of calls greater than 250 results in a cost per call less than .07.\r<BR>\n" );
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document.write( "you have to talk more than 250 minutes in a month for your cost per call to be less than .07.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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