document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1157349>Question 1157349</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The phone company A Fee and Fee has a monthly cellular plan where a customer pays a flat monthly fee and then a certain amount of money per minute used on the phone. If a customer uses 420 minutes, the monthly cost will be $64. If the customer uses 910 minutes, the monthly cost will be $113.\r<BR>\n" );
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document.write( "A) Find an equation in the form <BR>\n" );
document.write( "y=mx+b<BR>\n" );
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document.write( " where x<BR>\n" );
document.write( " is the number of monthly minutes used and y<BR>\n" );
document.write( " is the total monthly of the A Fee and Fee plan.<BR>\n" );
document.write( "B) Use your equation to find the total monthly cost if 863 minutes are used.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #780203 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=780203\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( " If a customer uses 420 minutes,<BR>\n" );
document.write( " the monthly cost will be $64. \r<BR>\n" );
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document.write( "C =mx + y\r<BR>\n" );
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document.write( "C= total cost <BR>\n" );
document.write( "m is cost per minute<BR>\n" );
document.write( "y is the fixed amount per month\r<BR>\n" );
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document.write( "64 =420m +y\r<BR>\n" );
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document.write( "If the customer uses 910 minutes, the monthly cost will be $113. <BR>\n" );
document.write( "113 =910m +y<BR>\n" );
document.write( "420.00	m	+	1.00	y	=	64.00		<BR>\n" );
document.write( "								<BR>\n" );
document.write( "								<BR>\n" );
document.write( "910.00	m	+	1.00	y	=	113.00	.............2	<BR>\n" );
document.write( "Eliminate 	y							<BR>\n" );
document.write( "multiply (1)by		-1.00						<BR>\n" );
document.write( "Multiply (2) by		1.00						<BR>\n" );
document.write( "-420.00	m		-1.00	y	=	-64.00		<BR>\n" );
document.write( "910.00	m		1.00	y	=	113.00		<BR>\n" );
document.write( "Add the two equations								<BR>\n" );
document.write( "490.00	m				=	49.00		<BR>\n" );
document.write( "/	490.00							<BR>\n" );
document.write( "m	=	0.10						<BR>\n" );
document.write( "plug value of			m	in (1)				<BR>\n" );
document.write( "420.00	m	+	1.00	y	=	64.00		<BR>\n" );
document.write( "42.00		+	1.00	y	=	64.00		<BR>\n" );
document.write( "			1.00	y	=	22. costy	=	22.00		<BR>\n" );
document.write( "Ans	m	=	0.10					<BR>\n" );
document.write( "	y	=	22.00					\r<BR>\n" );
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document.write( "cost per minute 10 cents<BR>\n" );
document.write( "Fixed monthly charge $ 22 \r<BR>\n" );
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document.write( " the total monthly cost if 863 minutes are used.\r<BR>\n" );
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document.write( "plug m,y,x to get monthly </SPAN>\n" );
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