3 years ago

Ava purchased a set of 35 stamps. Every month after that month, she purchased 3 more stamps for her collection.

Mathematics

1 answer:

kramer3 years ago

6 0

35+(3n)
i hope this is the correct equation

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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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Answer:

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