Andrea can clean a house 4 times as fast as Denise. When they work together, Andrea and Denise can clean a large house in 8 hours. How many hours would it take Denise to clean the house by herself?

20
15
10
5

Question

Andrea can clean a house 4 times as fast as Denise. When they work together, Andrea and Denise can clean a large house in 8 hours. How many hours would it take Denise to clean the house by herself?

 20
 15
 10
 5

anonymous · Answer

http://openstudy.com/study#/updates/53090bcce4b0f3b8dc8b8ff0

anonymous · Answer

if 3+3=9 i believe the answer is B

anonymous · Answer

So then whats the answer? that kinda confused me? @H3LPN33DED

anonymous · Answer

They state that 10 is the answer to the problem which would be C

anonymous · Answer

Btw im really sorry that I replied so late, the answer is probably useless at this point, sorry