когда НИ является отрицательной частицей?(маленький ответ плиз)

Записать на языке паскаль следующие выражения.
y=14х(в квадрате) -5х(в кубе) + 11х-17.
y=5x(в квадрате)-10х+2. 

Choose the right form.
1. Sarah ( was told / told ) that all the letters ( were / had been ) written. 2.Benny ( was greeted / greeted ) the people who (have been / had been) invited to the meeting. 3. These children (are / are being) never given any pocket money. 4. The inhabitants of the village (were / were being ) asked about people living in their neighbourhood when the police arrived. 5. Jane ( let / was let) her brother go to the cinema. 6. Children (are / are being ) seldom allowed to see horror films. 7. I entered the house when our seats ( were / were being ) shown to my parents. 8. The funny scene ( followed / was followed ) by the laughter of the adience. 9. John ( asked / was asked ) by his uncle if the fairs in the village ( were / had been ) often visited. 10. John says socks ( have not been / had not been ) mended yet.

Чай можно приготовить из листьев разных растений. На зиму заготовили 3070 Г чая из листьев кипрея, чая из листьев земляники на 840 Г больше, а чая из листьев брусники в 5 раз меньше , чем чая из листьев кипрея и земляники вместе. Сколько всего чая было заготовлено на зиму из этих растений? Ответ вырази в килограммах и граммах

Уравнять реакцию. Указать окислитель и восстановитель. H2SO3 + Cl2 + H2O → H2SO4 + HCl. Oпределить массу H2SO3, необ- ходимую для взаимодействия с 1,12 л хлора