( -65 ) + 54 + (- 13)

​= (-65) + ( -13) + 54

=( - 78 )+ 54

= -24

1. In spite of living in difficult conditions, she worked very hard.

2. The house has been decorated for three days.

3. In spite of the cloudy sky, we took mant pictures.

4. Because of the small room, we couldn't live in it.

5. Although they were poor, they lived happy together.

6. It took him an hour to wait for her.

Dạng yes - no question

1. He asked me if I could sing that song.

2. I asked him if thay were cutting grass that garden.

3. He asked me if I liked fish.

4. I asked him if she worked there.

5. They asked me if they playd guitar well.

Viết lại cậu

1. He have never been seen by me for a long time.

2. All the lights have been turned off by Tan.

=(86+14)+357

=100+357

=457                              tick nha hỏi  đáp mình thấp lắm

Ống nối nối tiếp dùng để:

A. Phân nhánh dây dẫn mà không sử dụng mối nối rẽ 

B. Sử dụng khi nối hai ống luồn dây vuông góc với nhau 

C. Nối nối tiếp hai ống luồn dây với nhau 

D. Cố định ống luồn dây dẫn trên tường

Sắp xếp các từ sau thành câu hoàn chỉnh

subjects / today? / do / have / What / you

35 ngày = 3024000s

Tốc độ góc là: \(\omega\) = \(\dfrac{2\pi}{T}\) = \(\dfrac{2.3,14}{3024000}\) \(\approx\) 2,076 . 10^-6 (rad/s)

Tốc độ dài là : v = \(\omega\) . R = 2,076 . 10^-6 . 150 . 10⁶ =311,4 (m/s)

Tốc độ chạm đất là :

v_{chạm đất} = \(\sqrt{2.g.h}\) = \(\sqrt{2.9,8.4,9}\) = 9,8 (m/s)

Ta có : t_bay = \(\sqrt{\dfrac{2h}{g}}\) = \(\sqrt{\dfrac{2.1,25}{10}}\) = 0,5 (s)

=> C

1. I prefer listening to music to chatting in my free time.

2. It takes us four hours to do our homework everyday.

3. He isn't contented with his son's school report.

4. There is only one church in my city.

5. What subjects do you like ?

6. Let's go to the seaside at weekends.

7. Don't forget to shut the windows before you leave.

8. What's Ms Kate's job?

9. They sings very well.

10. Everybody knows about it.