document.write( "Question 1085194: Luigi rides his bike to school and forgets his lunch. 10 min after he leaves the house, his
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Algebra.Com's Answer #699243 by ikleyn(52781)\"\" \"About 
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document.write( "Let t = \"How long until the mother catches up\".\r\n" );
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document.write( "Then  t = \"%28%2810%2A%2812%2F60%29%29%29%2F%28%28%2822-10%29%2F60%29%29\".\r\n" );
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document.write( "The numerator \"%2810%2A%2812%2F60%29%29\" is the distance between them when mother started move.\r\n" );
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document.write( "The denominator is their relative speed, in miles per minute.\r\n" );
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document.write( "So, t = \"%2810%2A12%29%2F12\" = 10 minutes.\r\n" );
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\n" ); document.write( "\n" ); document.write( "On catching up problems see the lesson\r
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