Обратите в Десятичные дроби:9/20 7/40 11/400 21/168 35/280 47/376

Решите пожалуйста 2 задачки

2. Раскройте скобки.          (Past Simple or Present Perfect)

1. Helen (to invite) her classmates to her home last Monday. They had a good time together.

2. … you (to buy) any Christmas present? - Not yet.

3. Tom (to be) already to the library. He is reading a very interesting book.

4. Alice (to collect) English and German coins last year.

5. I (to do) my homework. I can go out with my friends.

3.Напишите возвратные местоимения.

1. Do you like the salad? I have made it………………..

2. When you look in the mirror, you can see……………….

3. Mrs Wilson told her children, “Look at……………….in the mirror!”

4. I like Mary’s dress. Did she make it……………?

5. He looked at ……………….in the mirror and laughed.

6. We didn’t like the party. We didn’t enjoy……………….

7. Jack, you will enjoy……………..if you travel by train.

8. Thank you for a nice day. I have enjoyed………………….

9. “I can/t tell him the truth now,” she said to…………………….

10. All the people were enjoying…………………..

Вычислите давление  масла на дно гидравлической машины  если F=100Н S=75 СМ2

Пожалуйста, помогите! Это очень важно!

Из приведённых ниже выражений выберите все,которые при х=0 имеют смысл. х/х+2 ; х²/х-7 ; 5/х ; х/х(х-3)