запишіть рівняння прямої, у яку переходить пряма х+у=1 внаслідок гомотетії з центром О та коєфіцієнтом 5

Определите максимальную и минимальную длины звуковых волн воспринимаемых человеком. Скорость звука 340м/с граничные частоты V1= 20 Гц и V2= 20000 ГЦ.

Скорость катера по течению 22,5 км/час, а против течения 18,5 км/час. Какова собственная скорость катера?

3(х-1)+х=2х
5(х+4)+х=6
3(х+4)=5х-7
2(х-5)=7
12+3(х-1)=0
3(х-7)-6х=--х
2(х+дробь три пятых )-х = три целых одна пятая (дробь)
помогите решить пожалуйста..очень надо

Раскройте скобки,употребляя глаголы в требующемся времени

1. He said he (to leave) tommorow morning.

2. She says she already (to find) the book.

3. He stopped and listened: the clock (to strike) five.

4. She said she (can) not tell me the right time,her watch (to be) wrong.

5. I asked my neighbour if he ever (to travel) by air before.

6. The policeman asked George where he (to run) so early.

7. The delegates were told that the guide just (to go) cut and (to be) black in ten minutes.

8. I knew they (to wait) for me at the metro station and I decided to hurry.

9. I didn't know that you already (to wind) up the clock.

10. I was afraid that the little girl (not to be) able to unlock the front door and (to go) upstairs to help her.

11. He says that he (to know) the laws of the country.

12. Saire understood why Lanny (not to come) the previous evening.

13. She asked me whether I (to remember) the legend about a faithful lion.

14. He understood that the soldiers (to arrest) him.

15. He could not understand why people (not to want) to take water from that well.

16. I suppose they (to send) a dog after the burglar immediately.