Ma-li can paint a certain room in about 5 hours, and alicia can paint the same room in about 4 hours. Approximately how many hours would it take Ma-li and alicia to paint that rooom if they worked together?

Question

hero · Answer

$$\frac{M \times A}{M + A}$$

anonymous · Answer

can you explain that a little more please?

hero · Answer

That's the working together formula. Just input the values

M = Mali's hours to complete
A = Alicia's hours to complete

anonymous · Answer

so it would be 5x4/5+4 =20/9=2.22

hero · Answer

Which is approximately 2 hours, right?

anonymous · Answer

yes :)
this helped a lot, thank you!