Вопрос школьника по предмету Математика
Периметр прямоугольника равен 156м. найдите его площадь если ширина в 5 раз меньше длинны.
Ответ учителя по предмету Математика
5х-ширина
х-длина
2(5х+х)=156
10х+2х=156
х=15612
х=13-длина
65-ширина
13*65=845
ответ: 845
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In the United States, over 160 million tons of garbage are produced every year. Ten percent is recycled, ten percent is burned, and the rest is put in landfills. But finding land for new landfills is becoming more difficult.
A city that has solved this problem in an unusual way is Machida, in Tokyo, Japan. They have developed totally a new approach to garbage disposal. The key to the operation is public cooperation. Families must divide their garbage into six categories: 1 garbage that can be easily burned, such as kitchen and garden trash;
2 noncombustible garbage, such as small electrical appliances, plastic tools, and plastic toys;
3 products that are poisonous or that cause pollution, such as batteries;
4 bottles and glass containers that can be recycled;
5 metal containers that can be recycled;
6 large items, such as furniture and bicycles.
The items in categories 1 to 5 are collected on different days. Then the garbage is taken to a center that looks like a clean new office building or a hospital. Inside the center, special equipment is used to sort and process the garbage. Almost everything can be reused: garden or kitchen trash becomes fertilizer; combustible garbage is burned to produce electricity; metal containers and bottles are recycled; and old furniture, clothing, and other useful items are cleaned repaired, and resold cheaply or given away. The work provides employment for handicapped people and gives them a chance to learn new skills.
Nowadays, officials from cities around the world visit Machida to see it whether they can use some of these ideas to solve their own garbage disposal problems.
1) Течет река
2) характеристика героя
3) длинный день
4) пролетал газету
В каком предложении есть обстоятельство
1) Майор привёз мальчишку на лафете
2) Пусть льется свет лампады
3) расцвели нежно голубые цветочки
4) Улыбнулись сонные березки растрепали шелковые косы
В каком предложении нужно поставить только одну запятую
1) больше всего Ваня любил сказки
2) полно доченька не плачь
3) старый Лондон пахнет ромом жестью дымом и туманом
4) Но Кукушка на сосне кукует и тропинка к берегу видео