Упростите выражение(я не знаю как писать дроби в компьютере)две седьмых умножить на (1,4а-3 целых одну вторую b)-1,2x(пять шестых а-0,5b)

Парабола проходит через точки K(0;-5), L(4;3), M(-3;10). Найдите координаты ее вершины.

Помогите вставить слова в Текст плизз.Вот слова : achievement,create,enormous,member,name after,not discover,receive a degree,recognize research,succeed.

Вот текст:

Dmiti Mendeleev is a great Russian scientist of the 19th century.He 1(____) as a great chemist who created the periodic classification of the elements.Dmitri Mendeleev was born in Tobolsk in 1834.At school,Dmiti 2(____) in mathematics,physics,and geography but was not good at languages.In 1855 he graduated from Pedagogical institute in St Peterburg with a gold medal fo his 3(___).In 1856,he 4(____) in chemistry.Dmitri Mendeleev's contribution to the world's science was 5(______).He was the first 6(___) the dependence of the qualities of the elements on their atomic weight.He forecast that the gaps in the table of elements would be filled in by elements whith 6(______) yet.Dmitri Mendeleev was greatly honoured as a 7(_____) of academies in many countries.Elements No 101 8(___) him.