найдите наибольшее значение функции у=x^2-12x=121\x на промежутке [-21;-0,12]

Упражнение 7

Раскройте скобки, употребляя глаголы в Present или  Past Simple.

1. His sister (to study) English every day. 2. She (to study) English two years ago. 3. You (to come) home at six o'clock yesterday? - No, I ... . Yesterday I (to come) home from school at half past eight. I (to be) very tired. I (to have) dinner with my family. After dinner I (to be) very thirsty. I (to drink) two cups of tea. Then I (to rest). 4. I (to go) to bed at ten o'clock every day. 5. I (to go) to bed at ten o'clock yesterday. 6. My brother (to wash) his face every morning. 7. Yesterday he (to wash) his face at a quarter past seven. 8. I (not to have) history lessons every day. 9. We (not to rest) yesterday. 10. My brother (not to drink) coffee yesterday.

На клетчатой бумаге нарисован круг площадью 16. Найдите площадь заштрихованного сектора. Там одна восьмая закрашена

ПОжалуста помогите. Это текст его нужно перевести с англ. на русский. начало это 1 фотография. Заранее спасибо