document.write( "Question 705966: 1. Solve the following system of equations using Gaussian elimination method. If there are no solutions, type \"N\" for both x, y and z. If there are infinitely many solutions, type \"z\" for z, and expressions in terms of z for x and y.
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\n" ); document.write( "0x+7y+0z=-1
\n" ); document.write( "5x−5y+6z=-1
\n" ); document.write( "−5x+1y+3z=6 ..?\r
\n" ); document.write( "\n" ); document.write( "2. Phyllis invested 47000 dollars, a portion earning a simple interest rate of 4 percent per year and the rest earning a rate of 6 percent per year. After one year the total interest earned on these investments was 2620 dollars. How much money did she invest at each rate?\r
\n" ); document.write( "\n" ); document.write( "3.A movie theater charges $ 10 for adults and $ 7 for seniors. On a particular day when 347 people paid an admission, the total receipts were $ 2518. Round your answers to the nearest integers.. How many who paid were adults? .. How many who paid were seniors..? \n" ); document.write( "
Algebra.Com's Answer #434905 by solver91311(24713)\"\" \"About 
You can put this solution on YOUR website!

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document.write( " 0        	7        	0        	1        \r\n" );
document.write( " 5          -5        	6              -1        \r\n" );
document.write( "-5        	1        	3        	6        \r\n" );
document.write( "\r\n" );
document.write( "Swap row 1 and row 2\r\n" );
document.write( "			\r\n" );
document.write( "5        	-5        	6        	-1        \r\n" );
document.write( "0        	7        	0        	1        \r\n" );
document.write( "-5        	1        	3        	6        \r\n" );
document.write( "\r\n" );
document.write( "R2/7 to R2\r\n" );
document.write( "			\r\n" );
document.write( "5        	-5        	6        	-1        \r\n" );
document.write( "0        	1        	0        	   1/7  \r\n" );
document.write( "-5        	1        	3        	6        \r\n" );
document.write( "	\r\n" );
document.write( "R1 + R3 to R3\r\n" );
document.write( "		\r\n" );
document.write( "5        	-5        	6        	-1        \r\n" );
document.write( "0        	1        	0        	   1/7  \r\n" );
document.write( "0        	-4        	9        	5        \r\n" );
document.write( "		\r\n" );
document.write( "R1/5 to R1\r\n" );
document.write( "	\r\n" );
document.write( "1        	-1        	1   1/5  	-   1/5  \r\n" );
document.write( "0        	1        	0        	   1/7  \r\n" );
document.write( "0        	-4        	9        	5        \r\n" );
document.write( "	\r\n" );
document.write( "R1 + R2 to R1\r\n" );
document.write( "		\r\n" );
document.write( "1        	0        	1   1/5  	-   2/35 \r\n" );
document.write( "0        	1        	0        	   1/7  \r\n" );
document.write( "0        	-4        	9        	5        \r\n" );
document.write( "		\r\n" );
document.write( "4R2 + R3 to R3\r\n" );
document.write( "	\r\n" );
document.write( "1        	0        	1   1/5  	-   2/35 \r\n" );
document.write( "0        	1        	0        	   1/7  \r\n" );
document.write( "0        	0        	9        	5   4/7  \r\n" );
document.write( "		\r\n" );
document.write( "R3/9 to R3\r\n" );
document.write( "	\r\n" );
document.write( "1        	0        	1   1/5  	-   2/35 \r\n" );
document.write( "0        	1        	0        	   1/7  \r\n" );
document.write( "0        	0        	1        	  13/21 \r\n" );
document.write( "	\r\n" );
document.write( "-6/5*R3 + R1 to R1\r\n" );
document.write( "		\r\n" );
document.write( "1        	0        	0        	-   4/5  \r\n" );
document.write( "0        	1        	0        	   1/7  \r\n" );
document.write( "0        	0        	1        	  13/21 \r\n" );
document.write( "\r\n" );
document.write( "
\r
\n" ); document.write( "\n" ); document.write( "John
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\n" ); document.write( "Egw to Beta kai to Sigma
\n" ); document.write( "My calculator said it, I believe it, that settles it
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\"The

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