СРОЧНО.

Решить систему:

x^2 + y^2 = 61

x^2 - y^2 = -11

3. Вставьте anybody, somebody, nobody или everybody.

1. Don’t tell…about it. 2. Life is tough! …has problems. 3. I think, …in our class is honest. 4. …left a magazine in our classroom yesterday. 5. Is there…here who knows French. 6. You must find …who can help you. 7. …knew anything aboutAmericabeforeColumbusdiscovered it. 8. Is there…in the office? 9. There is…in the next room. 10. Please tell us the story. …knows it. 11. …can answer this question. It is very easy.

4.Образуйте форму Present Perfect  от глаголов:

work, write, make, meet, learn, ring, take, bring

5. Поставьте глагол в скобках в Present Simple.

1. Water (boil) at 100 degrees Celsius.

2. The moon (go) round the Earth.

3. I usually go to work by car.

4. Julia (to be) very good at languages. She (speak) 4 languages very well.

5. The River Nile (flow) into theMediterranean.

6. Вставьте make или do.

1. … discovery
2. … harm
3. … a promise
4. … certain
5. … damage
6. … an attempt
7. … a plan
8. … an excuse
9. … better
10. … their best

помогите прошу

(2121x23-218-82)x6-1175-1391=

чему равен объем одного моля идеального газа при нормальных условиях