(An)-конечная ариф. пр.. Известно ,что A1+...+An=30, а А1+Аn=3.Найдите число сленов в этой прогрессии 

открывающаяся наружу расширенная часть задней кишки земноводных, птиц, а также яйцекладущих млекопитающих, называется..

Complete the questions with the correct forms of the verbs to allow and to let and answer them.1. ....pupils at your school ........to run inside the building?2. .....pupils ......to wear jewellery?3. .....the teachers......you use mobile phones in class?4. .....they......pupils wear shorts?5. ..... you .... to eat in the classroom?6. ......the teachers you talk at the lesson?

в прямом параллелепипеде стороны основания равны 3 и 6, а боковая поверхность 24. найти объем и площадь

make up questions from the word and write what type of question it is.

1. Wash up, will, after dinner, who?

2. to the theatre, did, last friday, they, go?

3. Or, does, your, detectives, friend, action films, like?

4. Fairy-tale, are, now,you, what, reading?

5. Film, exciting, is, isn't, this, it?

6. Likes, films, who, romantic?

7. At, at, did, watch, or, "Star Wars", you. the cinema, home?

8. is, "harry Potter", when, on?

9. The main, this, is, who, film, character, in?

10. Haven't, love story, this, you, read, you, have?

 Кто быстрее сделает поставлю лучшее!!!