Two companies working together can clear a parcel of land in 20 hours. Working alone, it would take Company A 2 hours longer to clear the land than it would Company B. How long would it take Company B to clear the parcel of land alone? (Round your answer to the nearest tenth.)

Question

Two companies working together can clear a parcel of land in 20 hours.  Working alone, it would take Company A 2 hours longer to clear the land than it would Company B. How long would it take Company B to clear the parcel of land alone? (Round your answer to the nearest tenth.)

misty1212 · Answer

you really do have a lot don't you?

anonymous · Answer

I have 5 left i think. I answered 3 correctly before this one! :) and for this one, I got a decimal so I don't think it is right!

misty1212 · Answer

i get something bad too but maybe i did it wrong
i solved 
$$\frac{1}{x}+\frac{1}{x+2}=\frac{1}{20}$$

misty1212 · Answer

i got for the slower one $19+\sqrt{401}$

anonymous · Answer

Right and when you multiply both sides by the LCM I got 40x+40=x^2+2x

anonymous · Answer

Then x^2-38x-40=0

misty1212 · Answer

ok if you used the same equation, then is is probably right, not a pretty answer

anonymous · Answer

Okay I will try it!