(x-3y)(x+3y)-x(3x-y)+(3y-x)^

За обедом, мы поднимаем ложку на высоту 30 см. Рассчитайте работу, которую вы совершаете съедая тарелку супа. Ее вес 0,45 кг. Придумайте еще пару подобных не сложных задач которые можно задать за обедом...

найдите боковые стороны равнобедренной трапеции, основания которой равны 14см и 8см, а один из углов равен 120градусов

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Раскрыть скобки употребляя глаголы в таких временах : Present, Past, Future Simple; Present, Past, future Continuos; Present , Past Perfect

1. Look! He ( to look) strange without moustache. Why he ( to have) a shave? 

2. She says that tomorrow she ( to see) her favourite film at six oclock if she ( to come) home in time. 

3. There ( to be) nobody at my office yesterday. I ( to tell) everybody ( to go) home. 

4. I (no to think) that it ( to be) comfortable to ring him now. He just ( to arrive) from Europe and he ( to unpack) his things at the moment. 

5. When the old man shouted, the strangers ( to jump) off the fence and ( to run) away. 

6. I am sure that if they ( to see) me again, they ( to recognize) me at once. 

7. Sorry, I (not understand) you. Repeat please, what you just ( to say) 

8. Beth ( to come) by five oclock yesterday. She ( to come) into her room and ( to begin) reading an nteresting book which she ( to take) at the library

9. Andrew ( to feel) very excited yesterday as somebody ( to tell) him about the accident

10. Nick ( to be) happy last week because his father ( to allow) him to drive his car

11. Victiria ( tot be) always busy. She ( to be) busy nowtoo. Look! She ( to look) through the papers

12. Jane already ( to have) three letters from his parents since the day he ( to go) away