SOLUTION: 90.) Solve each problem Barn Painting. 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

Algebra ->  Algebra  -> Test -> SOLUTION: 90.) Solve each problem Barn Painting. 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       Log On

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 Click here to see ALL problems on test Question 164391This question is from textbook Elementary and Intermediate : 90.) Solve each problem Barn Painting. 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 fractions of the barn that they complete in one day by working together. Evaluate the expression for x = 5.This question is from textbook Elementary and Intermediate Answer by josmiceli(9664)   (Show Source): You can put this solution on YOUR website!Melanie's rate + Mellisa's rate = rate working together (1 barn / x days + 1 barn / 2x days) As an algebra expression: What this says is that they can paint 3 barns in 10 days by working together, but there is only 1 barn to paint. I'll make a new quantity called and I'll write This says (1 barn/y days) = (3 barns/10 days) Solve for by multiplying both sides by So, working together, they can paint 1 barn in days