Сколько двузначных чисел можно составить из цифр 1, 2, 3, 4, 5?

1.Что это за морфема?

2.Для чего используется в языке?

3.Где обычно стоит в слове?

Поставить нужные времена.

1) Jane was anry because Mark wasn't calling / hadn't called her since last weekend.

2) Sophie had a headache because her baby sister had been crying / was crying all afternoon.

3) Joanna switched / had switched the TV off and went to bed.

4) Mike slipped and twisted his ankle while he was playing / had played football yesterday.

5) Tony was shocked. He couldn't believe what had just happened / just happened.

6) After John had parked / had been parking the car, he went into the house.

7) This time yesterday, we lay / were lying on the beach sunbathing.

8) I didn't go out last night because i wasn't finishing / hadn't finished my homework.

9) Jack had been working / was working at the company for ten years before he left.

10) He was driving / had been driving for an hour when the car broke down.

100:(3х+1)=4 Помогите!!!!!

Для приготовления вишнёвого варенья на 2 части вишни берут 3 части сахара (по массе)

Вопрос: Сколько вишни и сколько сахара пошло на варенье, если сахара пошло на 7кг600г больше чем вишни.