3 years ago

Solve C = AB + D for B.

Mathematics

2 answers:

Talja [164]3 years ago

8 0

Answer:

C-D over A = B

Step-by-step explanation:

kirza4 [7]3 years ago

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Answer:

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Step-by-step explanation:

A pump can fill a swimming pool in 8 hours.

Work done by pump to fill in 1 hour is $\frac{1}{8}$

The pool also has a drain that can empty the pool in 10 hours.

Work done by pump to drain in 1 hour is $\frac{1}{10}$

If someone turns on the pump to fill the pool, but forgets to shut the drain.

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$W=\frac{1}{8}-\frac{1}{10}$

$W=\frac{10-8}{80}$

$W=\frac{2}{80}$

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Both pipe filled $\frac{1}{40}$ part of pool in hours = 1

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Therefore, 40 hours will it take for the pool to fill.

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