document.write( "Question 1150216: Find the distance between two parallel lines having the following equations: y=3/8x+4 y=3/8x-5 \n" ); document.write( "
Algebra.Com's Answer #771583 by Edwin McCravy(20067)\"\" \"About 
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document.write( "Get one line in the form Ax+By+C=0\r\n" );
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document.write( "Find any point on the other line.\r\n" );
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document.write( "Use this formula:\r\n" );
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document.write( "The perpendicular distance from the point (x1,y1)\r\n" );
document.write( "to the line Ax+By+C=0 is\r\n" );
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document.write( "\"d=abs%28Ax%5B1%5D%2BBy%5B1%5D%2BC%29%2Fsqrt%28A%5E2%2BB%5E2%29\"\r\n" );
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document.write( "y=3/8x+4\r\n" );
document.write( "Multiply through by 8\r\n" );
document.write( "8y=3x+32\r\n" );
document.write( "0=3x-8y+32\r\n" );
document.write( "3x-8y+32=0\r\n" );
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document.write( "A=3, B=-8, C=32\r\n" );
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document.write( "Pick any point on y=3/8x-5, say its y-intercept (0,-5)\r\n" );
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document.write( "\"d=abs%283%280%29-8%28-5%29%2B32%29%2Fsqrt%283%5E2%2B%28-8%29%5E2%29\"\r\n" );
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document.write( "\"d=abs%280%2B40%2B32%29%2Fsqrt%289%2B64%29\"\r\n" );
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document.write( "\"d=abs%2872%29%2Fsqrt%2873%29\"\r\n" );
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document.write( "\"d=72%2Fsqrt%2873%29\"\r\n" );
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document.write( "Rationalize the denominator:\r\n" );
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document.write( "\"d=72sqrt%2873%29%2F73\"\r\n" );
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document.write( "Edwin
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