Помогите решить задачу даю 30баллов. Радиус круга равен 8,4см. Найдите площадь круга и длину соответствующей
окружности (n=3,14).

У Тани одинаковое количество двухрублёвых и пятирублёвых монет. Сколько монет каждого достоинства у Тани, если их общая сумма равна 133 рублям?

Exercise 149. Put the verbs in brackets into the present, past or future simple.

1. Не (to turn) on the television to watch cartoons every morning. 2. He (to turn) on the television to watch cartoons yesterday morning. 3. He (to turn) on the television to watch cartoons tomorrow morning. 4.1 always (to go) to theAltai Mountainsto visit my relatives there. 5. I (to be) very busy last summer and I (not to go) there. 6. I (not to go) there next year because it (to cost) a lot of money and I can't afford it. 7. They (to enjoy) themselves at the Symphony yesterday evening? 8. Who (to take) care of the child in the future? 9. How often you (to go) to the dentist's? 10. We (not to have) very good weather, but we still (to have) a good time during our short stay inLondon. 10. She (to do) all the washing in their house. 12. He even (not to know) how to use the washing machine. 13. Two years ago they (to be) rich and money (to be) never a problem. 14. You (to think) you (to be) happy in your new neighbourhood? 15. When the cabbage soup (to be) ready? 16. The customs officers at JFK airport inNew York(to arrest) that young man when he (to arrive). 17. I (to like) to get on with my friends, so I often (to do) what they (to want). 18. When (to be) your birthday? 19. When you (to get) your watch? 20. Who (to create) Mickey Mouse?

4,72-2,5х=2х+2,92; 7х-5=-2х+15;4х-(3-2х)=-(13-5х); 2*(х+3)-4х=7х-4*(х-2). решите эти 3 уравнения до субботы пожалуйста!