Сколько вторичных атомов углерода содержится во всех структурных изомерах соединения состава С5Н10 (ациклические только)?

надо перевести 1) Where were we? 2)Could you give us an example,please? 3)Will we be tesked on this moterial? 4)I need some extra help 5) This is really difficult for me I tried hord,but I just couldan't figure it out.6) This was really easy 7) i`v got a question what`s a better way to say this what does it mean 8)i don`t understand this word , sentens 9)how do you pronouns this word 10)shald or shall 11) i start shald or shall 12) i go on shald or shall i read may i leave the may i go to the bathroom did i do this correctely is the correct what is this could in english is there are in other way at saying it can i say may i ask you question please could you repet the question can you write it on the board what must we do next

фонетичний розбір слова кавун, Яків, вулиця, тюльпан, понеділок, заєць. Скільки складів, букв, звуків, скільки приголосних і голосних. Які дзвінкі, які глухі?

на отрезке ав взяты точки м и N известно что ав=12 см ам=8см BN=10см найдите длину отрезка MN