а)За неделю израсходовали 5 кг картофеля.Сколько килограммоф картофеля расходовали каждый день?

б)из 3м ткани сшили 5 одинаковых салфеток.Сколькок метров ткани пошло на одну салфетку

 

 

Найдите в тексте синонимы следующих слов: wide, to research, to attempt, to examine, main, complex, difficult, various.

Найдите в тексте антонимы следующих слов: narrow, easy, practice, old, more, to begin, small, little.

Текст. Scientists study a wide variety of subjects. Some scientists search for clues to the origin of the universe and examine the structure of the cells of living plants and animals. Other researchers investigate why we act the way we do, or try to solve complicated mathematical problems. Scientists use systematic methods of study to make observations and collect facts. They develop theories that help them order and unify facts. Scientific theories consist of general principles or laws that attempt to explain how and why something happens or has happened. A theory is considered to become a part of scientific knowledge if it has been tested experimentally and proved to be true. Scientific study can be divided into three major groups: the natural, social, and technical sciences. As scientific knowledge has grown and become more complicated, many new fields of science have appeared. At the same time, the boundaries between scientific fields have become less and less clear. Numerous areas of science overlap each other and it is often hard to tell where one science ends and another begins. All sciences are closely interconnected. Science has great influence on our lives. It provides the basis of modern technology – the tools and machines that make our life and work easier. The discoveries and inventions of scientists also help shape our view about ourselves and our place in the universe.

Длина одного плеча рычага 50 см, другого – 10 см. На большее плечо действует сила 400 Н. Какую силу необходимо приложить к меньшему плечу, чтобы рычаг находился в равновесии? Пожалуйста опишите поподробнее с дано, решение и т.д.

Особенности строения корневой системы свеклы

РЕШИТЕ УРАВНЕНИЕ С НОРМАЛЬНЫМ ОБЪЯСНЕНИЕМ!                                                                        sinx+sin2x-sin3x=0