Question

Wes can paint a certain room in 8 hours. Sally can paint the same room in 5 hours. How long will it take them working together to paint the room? Give a rational expression to solve the problem,(5 points) then solve the problem.(5 points) Round your answer to the nearest hundredth if necessary.

Answer 1

The time it takes them working together to paint the room is 3.08 hours

Rational expression

Rational expression are equation written as a ratio of two expressions or equations.

If Wes can paint a certain room in 8 hours, she can paint 1/8 of the room in 1 hr

Similarly, if Sally can paint the same room in 5 hours, , she can paint 1/5 of the room in 1 hr

Determine the time it takes them to paint the room altogether.

Time together = x

Using the expression below to determine the value of x

1/x = 1/8 + 1/5

1/x = 5+8/40

1/x = 13/40
x = 40/13

x = 3.08

Hence the time it takes them working together to paint the room is 3.08 hours

Learn more on rational expression here; https://brainly.com/question/2264785

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