Какой синоним к слову розумний?

В треугольнике ABC угол A равен 51°, угол В равен 60°. AD, BE, CF - высоты, пересекающиеся в точке О. Найдите угол AOF. Ответ дайте в градусах

Обясните, как решать, пожалуйста!!!)

Составить формулы: 1)сульфат меди 2+гидроксид натрия= 2)хлорид калия+фосфат натрия= 3)сульфат алюминия+раствор хлорида бария=

Помогите пожалуйста сделать задания

II. Choose the correct item.

1. He filled in his name, signed the contract and………it to the secretary.

A  gave                           B has given                    C had given

2. He was soaked to the skin because he..........in the rain.

A  walked                       B is walking                    C had been walking

3. Joseph .......... in the garden since eight this morning.

A  has dug                      B has been digging          C is digging

4.  .........this new film yet?

A   Do you see                B Have you seen            C Are you seeing

5. John..........as a waiter until he finds a better job.

A  is working                  B works                          C has worked

III. Turn from direct into reported speech.

3. 'We aren't doing anything next week,' they said.

5. 'I can't go out tonight,' she said to me.

8. 'I forgot to pay the bill,' he said.

9. “The sun rises in the East,” Mary said.

10. 'We've brought you a present,' she said to me.

IV. Write passive sentences.

2. A speech (give) by the President tomorrow. 

10. Bread (make) from wheat.

Разложите многочлен на множители:

1)3m-6n+mn-2n(2)

2)9a(2)-16

3)y(3)+18y(2)+81y