document.write( "Question 771623: Determine whether the lines are parallel, perpendicular, or neither.
\n" ); document.write( "2x-y=-10
\n" ); document.write( "2x+4y=2
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Algebra.Com's Answer #470322 by MathLover1(20849) $\"\"$ $\"About$

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$\"2x-y=-10\"$
\n" ); document.write( " $\"2x%2B4y=2\"$ \r
\n" ); document.write( "\n" ); document.write( "first write them in slope-intercept form $\"y=mx%2Bb\"$
\n" ); document.write( "if they have same slope $\"m\"$ , lines are parallel\r
\n" ); document.write( "\n" ); document.write( " $\"2x-y=-10\"$
\n" ); document.write( " $\"2x%2B10=y\"$ => slope is $\"m=2\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"2x%2B4y=2\"$
\n" ); document.write( " $\"4y=-2x%2B2\"$
\n" ); document.write( " $\"y=-2x%2F4%2B2%2F4\"$
\n" ); document.write( " $\"y=-%281%2F2%29x%2B1%2F2\"$ => slope is $\"m%5B1%5D=-1%2F2\"$ \r
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\n" ); document.write( "\n" ); document.write( "since $\"m=2\"$ is not equal to $\"m%5B1%5D=-1%2F2\"$ , lines are not parallel\r
\n" ); document.write( "\n" ); document.write( "if they have slopes negative reciprocal of each other or $\"m%5B1%5D=-1%2Fm\"$ , lines are perpendicular\r
\n" ); document.write( "\n" ); document.write( "since $\"m%5B1%5D=-1%2F2\"$ is negative reciprocal of $\"m=2\"$ ,lines are perpendicular\r
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\n" ); document.write( "\n" ); document.write( " $\"+graph%28+600%2C+600%2C+-15%2C+15%2C+-15%2C+15%2C2x%2B10%2C-%281%2F2%29x%2B1%2F2%29+\"$
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