Предмет: Математика, автор: Vladlen4ik5B

Помогите,прошу!(6 класс)

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Автор ответа: vekonaft109

1

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4 ответ

Пошаговое :

Автор ответа: WhyNott

0

Ответ:

20 мальчиков

от 25 нужно сначала узнать девочек.

25 × 20% = 5 девочек

25 - 5 = 20 мальчиков

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Предмет: Английский язык, автор: Аноним

Man has been trying to make his life easier for many centuries. In doing so, he invented machines and instruments. They have been working and polluting the world we live in.
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One of the most important pollution problems is in the oceans. Many ships sail in the ocean water — fishing ships, some ships carrying people, some carrying oil. If a ship loses some of the oil in the water, or trash from the ships is put into the ocean, the water becomes dirty. Many birds and fish die because of the polluted water. Many fish are dying in the sea, others are getting contaminated. Fishermen catch contaminated fish which may be sold in markets and people may get sick from eating them. Fish may also move to another part of the ocean. Lakes and rivers are getting polluted, too. Some beaches are considered dangerous for swimming.
The second important problem is air pollution. Cars and factories pollute the air we use. It also destroys the ozone layer which protects the Earth from the dangerous light of the Sun.
Another problem is that our forests are dying from acid rain. This, in turn, affects the balance of nature.
If we want our children to live in the same world we live in, or in a better and healthier world, we must learn to protect the water, the air and the earth from pollution

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