Предмет: Геометрия, автор: Maksim2468

помогите пожалуйста первый и второй номер

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Автор ответа: BlackHomie

угол АДС=180°-110°=70
90-70=20
угол А=20+20=40
угол С=90°
угол В=90-40=50

угол ДАС=90-55=35
угол ДСА=90-35=55
угол АВД=90-55=35
угол ВАС=90

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Предмет: Математика, автор: sedovsedov

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Предмет: Английский язык, автор: daniilvognerubov387

Вариант 1
1. Установите соответствие между заголовками А-E и текстами 1-4. Занесите свои ответы в таблицу. Используйте каждую букву только один раз. В задании один заголовок лишний.
A. Tomorrow’s vegetables.
B. Environment in danger.
С. Unhealthy eating habits. D. Genetically modified food.
E. Fast food.

1. Fast food and packaging come together. When you have eaten the beefburger, you throw away the packaging and somebody will then bum or bury it. This is clearly a problem. Fast food also contributes to global warming. In Brazil, 12 million acres of forest were cut down to build farms. Farmers use this land to grow soya beans and soya is given to the cows that become the beef in your beefburger. Fewer forests mean more global warming.
2. Traditional methods of cooking and eating are disappearing, and are being replaced by fast food and ready-prepared meals. As a result, people today (especially children) have too much sugar, too many sweet drinks, too much white bread. This makes people’s level of blood glucose go up, causing tiredness, nervousness and headaches. Among schoolchildren it can also cause low concentration and bad behaviour.
3. A lot of fast food contains ingredients that have been changed by scientists to be different: the tomatoes in the tomato sauce, the flour in the bread. How is it possible that you can buy a bright red tomato in London, that comes from Cyprus, that is still fresh after four weeks? But the changes are not always bad. Some plants can be modified to provide more vitamin C, for example.
4. Not many children like vegetables. It has been proved that eating vegetables in childhood helps to protect you against serious illness in later life. So yesterday chocolate-flavoured carrots went on sale in Britain as part of a campaign to encourage children to eat vegetables. The range of products also includes cheese-and-onion flavoured cauliflower, pizza-flavoured sweeets, and peas that taste like chewing-gum.
1 2 3 4

2. Раскройтескобки, употребляя Present Perfect или Past Simple.
1. I already (to do) my homework. Now I can go for a walk. 2. I (to do) my homework yesterday? 3. He just (to come) home. 4. He (to come) home a minute ago. 5. Nick (not to play) football yesterday. 6. You ever (to see) the eruption of a volcano?
3. Раскройтескобки, используяIтипусловныхпредложений.
1. If I (to have) time tonight, I (to finish) this book.
2. If my friend (to phone) me tonight, I (not feel)so lonely.
3. If John (to want) the advice, he (to ask) you.
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{40x+3y=10
{20x-7y=5
и ось ще одну систему
{5x-2y=1
{15x-3y=-3

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