document.write( "Question 382249: PLEASE HELP. I wanted to put some effort but does not look right.
\n" ); document.write( "Solve the system of equations by graphing. Then classify the system. \r
\n" ); document.write( "\n" ); document.write( "4x-y =20
\n" ); document.write( "4x+5y = -28;\r
\n" ); document.write( "\n" ); document.write( "I substituted for x with 5 in the first equation: 4 (5)-y = 20-5; y = 15; (5,15)\r
\n" ); document.write( "\n" ); document.write( "I then substituted -9 for y in the same equation: 4x-(-9) = 20; 4x+9-9=20-9; x = 2.75; (2.75, -9).\r
\n" ); document.write( "\n" ); document.write( "Second equation
\n" ); document.write( "4x+5y = -28; I substituted 0 for x; 4(0)+5y = -28; y = -5.6. The first point is (0,-5.6).
\n" ); document.write( "I then substituted -9 for y in the same equation; 4x+5(-9) = -38; 4x+45-45 = -38-45; 4x=7; Divide by 4; x = 1.8; Second points (1.8, -9)
\n" ); document.write( "They are consistent because of one solution and are independent as well?? help.
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Algebra.Com's Answer #270967 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
Solve the system of equations by graphing. Then classify the system.
\n" ); document.write( "4x-y =20
\n" ); document.write( "4x+5y = -28;
\n" ); document.write( "I substituted for x with 5 in the first equation: 4 (5)-y = 20-5; y = 15; (5,15)
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\n" ); document.write( "4x-y = 20
\n" ); document.write( "4*5 - y = 20
\n" ); document.write( "y = 0
\n" ); document.write( "(5,0) is better.
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\n" ); document.write( "I then substituted -9 for y in the same equation: 4x-(-9) = 20; 4x+9-9=20-9; x = 2.75; (2.75,-9)
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\n" ); document.write( "Second equation
\n" ); document.write( "4x+5y = -28; I substituted 0 for x; 4(0)+5y = -28; y = -5.6. The first point is (0,-5.6)
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\n" ); document.write( "I then substituted -9 for y in the same equation; 4x+5(-9) = -38; 4x+45-45 = -38-45; 4x=7; Divide by 4; x = 1.8; Second points (1.8,-9)
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\n" ); document.write( "4x - 45 = -28
\n" ); document.write( "4x = 17
\n" ); document.write( "x = 4.25
\n" ); document.write( "(4.25,-9) not (1.8,-9)
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\n" ); document.write( "They are consistent because of one solution and are independent as well?? help.
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\n" ); document.write( "They're consistent and independent.
\n" ); document.write( "If you plot the points and graph them, you'll see they intersect.
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\n" ); document.write( "dl the FREE graph software at
\n" ); document.write( "http://www.padowan.dk
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