a). Để hai hàm số cắt nhau thì:

   a≠a'⇒ m+5=2m+1

⇔ m+5=2m+1

⇔ m-2m=1-5

⇔  -m    = -4

⇔  m     = 4.

Vậy hai hàm số cắt nhau khi m =4.

b). Để hai hàm số song song khi:

\(\left\{{}\begin{matrix}a=a'\\b\ne b'\end{matrix}\right.\)⇒\(\left\{{}\begin{matrix}m+5=2m+1\\-2m+3=3m\end{matrix}\right.\)⇔\(\left\{{}\begin{matrix}m=-4\\m\ne\dfrac{3}{5}\end{matrix}\right.\)

Vậy hai hàm số đó song song khi m=-4; m≠\(\dfrac{3}{5}\).

c). Để hai hàm số trùng nhau khi:

\(\left\{{}\begin{matrix}a=a'\\b=b'\end{matrix}\right.\)⇒\(\left\{{}\begin{matrix}m+5=2m+1\\-2m+3=3m\end{matrix}\right.\)⇔\(\left\{{}\begin{matrix}m=-4\\m=\dfrac{3}{5}\end{matrix}\right.\)

Vậy hai hàm số đó trùng nhau khi m=-4; m=\(\dfrac{3}{5}\).

D

1.He suggest that we should put off the trip on Sam Son beach in the next week because of the bad weather.

2. Two years ago, when I knew how to ride a bicycle, my elder brother was able to drive a motorbike competently.

Thời gian đi ngủ và thức dậy của A ko hợp lí vì thức quá khuya để chơi game là ko tốt, dễ gây hỏng giác mạc, bệnh,... và thức dậy lúc 11h trưa là quá trễ, tóm lại bạn ấy đi ngủ và thức dậy ko đồng đều, bạn ấy cần cân bằng lại thời gian đi ngủ vs thức dậy

1. She asked me that what my name was.

2. He asked me what shool I was going to.

3. She asked how many languages I could speak.

4. She asked why I wanted to take the course.

5. She asked me when the course would begin.

6. She asked me how much the course fees was there.

7. She asked me that when I started shool vacation.

8. She asked me why I wanted that job.

9. She asked me how old I was.

10. She asked me which grade I was in.

11. Uncle Hung said that birthday cake was delicious.

12. Miss Nga said she loved those roses.

13. Cousin Mai said he was having a wonderful time there.

14. Mr. Chi said she would go to Hue the following day.

15. Mrs. Hoa said she might have a new job.

16. Mr. Quang said he had to leave then.

17. She asked me If I liked learning English.

18. She asked me if I near there shool.

19. She asked him if he went to shool by bicycle.

20. He asked her If she could use a computer.

A