3х-5у=-1,

3у+4х=-11.

 

решить систему

Основанием пирамиды является треугольник со сторонами 10 см,8 см и 6 см. Каждая боковая грань наклонена к плоскости основания под углом 45 градусов. Найдите площадь полной поверхности пирамиды.

    Напишите вопросы к следующим предложениям, начиная их словами: Do...? Does...?

1. I like chocolate. And you?...

2. I plane tennis. And you?

3. Tom plays tennis. And you?

4. You live near here. Andyour friends?

5. You speak English. And your brother?

6. I do exercises every morning. And you?

7. Sue often goes away. And you?

8. I want to be Famous. And you?

9. You work hard. And Linda?

     Напишите вопросы, начиная их со вспомогательного глагола Did...?

1. I watched TV last  night. And you? Did you...?

2. I enjoyed the party. And you?

3. I had a good holiday. And you?

4. I finished work early. And you?

5. I slept well last night. And you?