Two car washers, Michelle and Nancy, are working on your car. Michelle can complete the work in 6 hours, while Nancy can complete the work in 3 hours. How many hours does the car washing take if they work together?
3
2
six eighths
four thirds

Question

Two car washers, Michelle and Nancy, are working on your car. Michelle can complete the work in 6 hours, while Nancy can complete the work in 3 hours. How many hours does the car washing take if they work together?
3
2
six eighths
four thirds

anonymous · Answer

someone please help me . i really need to get this done soon

anonymous · Answer

none whatsoever

anonymous · Answer

well actually im thinking its 6/8 but idk

kropot72 · Answer

In one hour Michelle, working alone, can complete 1/6 of the work.
In one hour Nancy, working alone, can complete 1/3 of the work.
Therefore if they work together for one hour they can complete 1/6 + 1/3 =1/2 of the work.
Can you now see how many hours they would take to do the job when working together?

anonymous · Answer

so is it 2?

anonymous · Answer

@kropot72

kropot72 · Answer

Yes, 2 hours is correct.

anonymous · Answer

thank you 
can you possibly help me with another?

kropot72 · Answer

You're welcome. I'll try to help.

anonymous · Answer

Which of the following expressions is the conjugate of a complex number with 2 as the real part and 3i as the imaginary part?
 2 + 3i
2 − 3i
3i + 2
3i − 2
I'm thinking it's 3i+2

anonymous · Answer

@kropot72

kropot72 · Answer

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The above example might help you. Note the reversal of sign.

anonymous · Answer

so would it be 3i+2?