document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=900711>Question 900711</A>: <I><SPAN STYLE=\"word-break: break-all;\"> i know it said don't dump your homework but i only have these two for college algebra. please get back<BR>\n" );
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document.write( "An executive invests $22,000, some at 7% and some at 5% annual interest. If he receives an annual return of $1,420, how much is invested at each rate?\r<BR>\n" );
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document.write( "A doctor prescribes an ointment that is 4% hydrocortisone. A pharmacist has 1% and 5% concentrations in stock. How many ounces of each should the pharmacist use to make a 1-ounce tube?<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 #546089 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=546089\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Part I	7.00%		per annum	-------------	Amount invested =x	<BR>\n" );
document.write( "Part II	5.00%		per annum	------------	Amount invested = y	<BR>\n" );
document.write( "	22000					<BR>\n" );
document.write( "Interest-----	1420.00					<BR>\n" );
document.write( "						<BR>\n" );
document.write( "Part I	7.00%		per annum	---x		<BR>\n" );
document.write( "Part II	5.00%		per annum	---y		<BR>\n" );
document.write( "Total investment						<BR>\n" );
document.write( "x	+	1	y=	22000	-------------1	<BR>\n" );
document.write( "Interest on both investments						<BR>\n" );
document.write( "7.00%	x	+	5.00%	y=	1420	<BR>\n" );
document.write( "Multiply by		100				<BR>\n" );
document.write( "7	x	+	5	y=	142000.00	--------2<BR>\n" );
document.write( "Multiply (1) by			-7			<BR>\n" );
document.write( "we get						<BR>\n" );
document.write( "-7	x	-7	y=	-154000.00		<BR>\n" );
document.write( "Add this to (2)						<BR>\n" );
document.write( "0	x	-2	y=	-12000		<BR>\n" );
document.write( "divide by		-2				<BR>\n" );
document.write( "			y	=	6000	<BR>\n" );
document.write( "Part I	7.00%	$	16000			<BR>\n" );
document.write( "Part II	5.00%	$	6000			<BR>\n" );
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document.write( "CHECK						<BR>\n" );
document.write( "16000	---------	7.00%	-------	1120.00		<BR>\n" );
document.write( "6000	-------------	5.00%	-------	300.00		<BR>\n" );
document.write( "Total			--------------------	1420.00<BR>\n" );
document.write( "------------------ \r<BR>\n" );
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document.write( "Hydrocortisone													<BR>\n" );
document.write( "	percent	----------------			quantity								<BR>\n" );
document.write( "Type I	1.00%	----------------			x	ounce							<BR>\n" );
document.write( "Type II	5.00%	------	1	-	x	ounce							<BR>\n" );
document.write( "Mixture	4.00%	----------------	1										<BR>\n" );
document.write( "Total	1		ounce										<BR>\n" );
document.write( "1.00%	x	+	5.00%	(	1	-	x	)	=	4.00%	*	1	<BR>\n" );
document.write( "1	x	+	5	(	1	-	x	)	=	4			<BR>\n" );
document.write( "1	x	+	5	-	5	x	=			4			<BR>\n" );
document.write( "1	x	-	5	x			=	4	-	-5			<BR>\n" );
document.write( "-4	x			=	-1								<BR>\n" );
document.write( "/	-4												<BR>\n" );
document.write( "	x			=	0.25		ounce			1.00%		Type I	<BR>\n" );
document.write( "					0.75		ounce			5.00%		Type II	\r<BR>\n" );
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document.write( "		<BR>\n" );
document.write( "						<BR>\n" );
document.write( "m.ananth@hotmail.ca						<BR>\n" );
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