document.write( "Question 75276: 1. Grace has 16 jellybeans in her pocket. She has 8 red ones, 4 green ones and 4 blue ones. What is the minimum number of jellybeans she must take out of her pocket to ensure she has one of each color?\r
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document.write( "2. Sally can paint a house in 4 hours and John can paint the same house in 6 hours. How long will it take for both of them to paint the house together? \n" );
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Algebra.Com's Answer #54062 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! 1. Grace has 16 jellybeans in her pocket. She has 8 red ones, 4 green ones and 4 blue ones. What is the minimum number of jellybeans she must take out of her pocket to ensure she has one of each color? \n" ); document.write( "She might pick 8 red ones, then 4 green ones; the next one she picks will \n" ); document.write( "result in her having at least one of each color. \n" ); document.write( "So 8+4+1 picks will guarantee she meets the criteria. \n" ); document.write( "=============== \n" ); document.write( " \n" ); document.write( "2. Sally can paint a house in 4 hours and John can paint the same house in 6 hours. How long will it take for both of them to paint the house together? \n" ); document.write( "Sally DATA: \n" ); document.write( "time= 4 hr/job ; rate=(1/4) job/hr \n" ); document.write( "------- \n" ); document.write( "John DATA: \n" ); document.write( "time = 6 hr/job ; rate=(1/6) job/hr \n" ); document.write( "------------ \n" ); document.write( "Together DATA: \n" ); document.write( "time = x hr/job ; rate = (1/x) job/hr \n" ); document.write( "=============== \n" ); document.write( "EQUATION: \n" ); document.write( "rate + rate = rate together \n" ); document.write( "1/4 + 1/6 = 1/x \n" ); document.write( "Multiply thru by 12x to get: \n" ); document.write( "3x + 2x = 12 \n" ); document.write( "5x=12 \n" ); document.write( "x= 2.4 hrs (Time to do the job together) \n" ); document.write( "x= 2 hrs and 24 minutes \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |