(12ab -5ab)-(ab + 6a) ПОМОГИТЕ!!!

 вычислите: 2sin15cos15

Объясните, почему вам или кому-либо пришлось сделать что-либо в определенной ситуации. Используйте слова, данные в
скобках

Example: Last month my work began at 8(to get up early)
Last month my work began at 8, so I had to get up early.


1. The bus was overcrowded. (to take a taxi)

2. It was raining heavily. (to take an umbrella)

3. My son could not translate the text. (to help him)

4. The bus was leaving in 5 minutes. (to hurry up)

5. He was having his exam at the end of January. (to work hard)

6. Something was wrong with the TV-set. (to call a specialist)

7. His wife was away on business last week. (to cook meals)

8. We didn’t get tickets for the evening performance. (to go to the morning performance)

КАК ЧЕЛОВЕК ИСПОЛЬЗУЕТ В БЫТУ ЭЛЕКТРИЧЕСТВО?

найдите площадь круга, если 2/7 длина окружности этого круга равна 24,8 см.(числа п =3,1)