document.write( "Question 58713: Barn painting. Melanie can Saint a certain barn by herself in x days. Her helper Melissa can paint the same barn by herself in 2x days. Write a rational expression for the fraction of the barn that they complete in one day by working together. Evaluate the expression for x = 5 \n" ); document.write( "
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Barn painting. Melanie can Saint a certain barn by herself in x days. Her helper Melissa can paint the same barn by herself in 2x days. Write a rational expression for the fraction of the barn that they complete in one day by working together. Evaluate the expression for x = 5
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\n" ); document.write( "Melanie DATA:
\n" ); document.write( "Time = x days/job ; Rate = 1/x job/day
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\n" ); document.write( "Melissa DATA:
\n" ); document.write( "Time = 2x days/job ; Rate = 1/2x job/day
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\n" ); document.write( "Together data:
\n" ); document.write( "Rate= 1/x + 1/2x = 2/2x+1/2x= 3/2x job/day
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\n" ); document.write( "If x=5, Rate = 3/(2*5)=3/10 job in a day
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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