document.write( "Question 188940: is the equations y=-2x+7 and y=-2x-6 parallel or perpendicular?
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Algebra.Com's Answer #141697 by jojo14344(1513)\"\" \"About 
You can put this solution on YOUR website!

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\n" ); document.write( "Given: \"system%28y=highlight%28-2%29x%2B7%28EQN1%29%2Cy=highlight%28-2%29x-6%28EQN2%29%29\"\r
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\n" ); document.write( "\n" ); document.write( "Just by looking on the eqns, they are parallel.\r
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\n" ); document.write( "\n" ); document.write( "Why? Remember Parallel Lines have the same Slope=m, ---> y=mx+b\r
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\n" ); document.write( "\n" ); document.write( "We can prove by solving the eqns.\r
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\n" ); document.write( "\n" ); document.write( "In EQN 1:
\n" ); document.write( "Let fy=0 ----> \"0=-2x%2B7\" ----> \"2x=7\" ----> \"cross%282%29x%2Fcross%282%29=7%2F2\"
\n" ); document.write( "\"red%28x=7%2F2%29\", X-Intercept
\n" ); document.write( "Let fx=0 ----> \"y=-2%280%29%2B7\"
\n" ); document.write( "\"red%28y=7%29\", Y-Intercept\r
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\n" ); document.write( "\n" ); document.write( "In EQN 2:
\n" ); document.write( "Let fy=0 ---> \"0=-2x-6\" ---> \"2x=-6\" ----> \"cross%282%29x%2Fcross%282%29=cross%28-6%293%2Fcross%282%29\"
\n" ); document.write( "\"red%28x=-3%29\", X-Intercept
\n" ); document.write( "Let fx=0 ---> \"y=-2%280%29-6\"
\n" ); document.write( "\"red%28y=-6%29\"\r
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\n" ); document.write( "\n" ); document.write( "We'll see the graph,
\n" ); document.write( " ---> RED, EQN 1; GREEN, EQN 2\r
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\n" ); document.write( "\n" ); document.write( "Thank you,
\n" ); document.write( "Jojo
\r
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