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1,One pump can empty a pool in 3 days, whereas a second pump can empty the pool in 11 days. How long will it take

the two pumps, working together, to empty the pool? (Fractional answers are OK.)

The first pump's rate is   per day.

The second pump's rate is  per day.

The combined pumps rate is   per day.

It will take the two pumps   days to empty the pool together.

2, Simplify: 8 x x − 5 + 6 ( x − 5 ) 2

3,Simplify and enter answer as a reduced fraction.

18 2 12 7

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