document.write( "Question 1074107: Find the distance between the pair of points (4,9) and (13,21) \n" ); document.write( "
Algebra.Com's Answer #688846 by ikleyn(52782)\"\" \"About 
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document.write( "Take the difference of x-coordinates: dx = 13 - 4 = 9.\r\n" );
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document.write( "Take the difference of y-coordinates: dy = 21 - 9 = 12.\r\n" );
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document.write( "Now the distance is \"sqrt%28%28dx%29%5E2+%2B+%28dy%29%5E2%29%29\" = \"sqrt%289%5E2+%2B+12%5E2%29\" = 15.\r\n" );
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