Ответ по предмету Математика: Один тракторист может вспахать поле за 18ч, а другой за -12 ч. Какую часть поля они вспашут вместе, если первый будит работать 5ч, а второй -7ч?

Предмет: Математика, автор: linnila01

504 в
505 в
512 а,б, в
Срочно пожалуйста!!!!

7 лет назад

Предмет: Английский язык, автор: pavelkrazevskih192

Past Simple / Past Perfect
1. The last week of my holidays (to be) the worst week I ever (to have).
2. His speech (to be) impressive. She (to work) on it since Monday.
3. She (not/ can) get into the concert as she (to lose) her ticket.
4. He (not/to want) to drive a car anymore. He to drive) it for 30 years.
S. I (to agree) to meet her though I was angry with her as we (to quarrel) earlier
6. She (to break) her arm and (not/ can) write for a week.
7. He (to speak) German until he (to go) to Germany?
8. Before I (to gain) a management position, I (to work) for the company for only 6 months.
9. The train (to leave) 5 minutes before Nancy (to arrive) at the station
10. Grace (to enter). (to take) the seat and (to look) at me.
11. We (to see) a program about India, so we (to go) to the places they (to recommend).
12. They (not/to transfer) money by 5 O'clock.
13. Before the doctor (to write) a prescription, he (to examine) me.
14. My sister (to finish) all her wedding preparations by the end of the spring.
15. Debora (to come) to tell us she (to make) the coffee.
16. Barely they (travel) a third of the way when their car (break) down.
17. We (to arrive) at work in the morning and (to find) that somebody (to break) into the office during the
night.
18. We were driving along the road when we (to see) a car which (to break) down, so we (to stop) to see
if we could help
19. They (to run) out of money by the end of the month.
20. We (to hope) that Dad (to catch the train.
21. Hardly she (begin) to speak when there (be) a shout from the back of the hall.
22. I(to get this job because I (to prepare) for the interview really well.
23. He (to tell) me that his Granny (to be) ill since the previous week.
24. He (to start) the car, (to turn) the radio on and (to fasten) the seat belt.
25. When I (to get) home, I(to find) that my son (to take) my car.
26. No sooner I (walk) in the door than the phone (ring).
27. I(not/to worry) about speaking in front of so many people. I(to give) public speeches before.
28. Before he (to propose) to her, he (to spend) many hours looking for a perfect ring.
29. My brother's birthday was in full swing, when I (to realize) that I (to forget) to buy a birthday cake.
30. Claudia (to be) on cloud nine. I(to give) her a Tiffany necklace.
31. I(to be) so surprised to learn that our cat (to give) birth to 25 kittens.
32. He (to finish) composing the song by six in the morning.
33. By the time I (arrive) at the airport, my fiancé already (to go).
34. They (to be) so excited. They (not/ to dance) together since 2017.
35. You (to clean up the mess by the time your husband (to come) home?
36. You (to look) pale. Anybody (to scare) you?
37. Before he (to become) a famous actor, Hugh Jackman (to work) as a clown.
38. As soon as the exam (to be) published, I (to register) for it.
39. Jeremy (to be) in despair. All his dreams (to be) crushed.
40. She (not/can) to call him because she (to delete) his number.
41. "Green Mile" (to be) one of the saddest films I ever (to watch)
42. I (to get) the cat out of the tree. It (to run) away from the house, (to climb) the tree and (to get) stuck
up there.
43. I(to be) horrified when I (to see) the consequences of their fight. They (to break) the vase, (to
overturn) chairs and (to smash) the mirror,

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Один тракторист может вспахать поле за 18ч, а другой за -12 ч. Какую часть поля они вспашут вместе, если первый будит работать 5ч, а второй -7ч?

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