SOLUTION: Melanie can paint 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,

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Melanie can paint 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,      Log On


   

Question 370153: Melanie can paint 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. Evaluation the
expression for X=5.. Can you help me?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi,

Melanie can paint a certain barn by herself in X days. Milissa in 2x days.

the fractional part of the barn,that they complete in one day by working together. 

1/x + 1/2x 

x = 5

1/5 + 1/10 = 2/10 + 1/10 = 3/10 of the barn can be painted in one day working together.  

(3 1/10 days to finish it)