It takes sara 2 hours to paint a fenceand Daniel 4 hours to paint the same fence

Question

It takes sara 2 hours to paint a fenceand Daniel 4 hours to paint the same fence. How long will it takethem to paint the fence if they both work together?
here's another
Jay has 8 cats that need to be fedwhile he's away on a 12 day vacation. If a bag of cat food will feed 3cats for 15 days, how many bags does he need for hisvacation?
Please help!
here's another
Jay has 8 cats that need to be fedwhile he's away on a 12 day vacation. If a bag of cat food will feed 3cats for 15 days, how many bags does he need for hisvacation?
Please help!

Explanation / Answer

If it takes Sarah 2 hours and Jack 4 hours it would take thema total of 6 hours combined. If they painted it together divideFirst: 2x+4x=2
Second: 6x/2=3

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