M=4- [ 5x-2] - [3y+12]

Ta có:[5x-2]>(hoặc bằng) 0

        -[5x-2]<(hoặc bằng) 0

      4-[5x-2]<(hoặc bằng) 0+4

      4-[5x-2]<(hoặc bằng) 4

Dấu "=" xảy ra khi 5x-2=0

                               5x=0+2 

                               5x=2

                                 x=2:5

                                  x=0,4

Ta có:[3y+12]>(hoặc bằng) 0

         -[3y+12]<(hoặc bằng) 0

         4-[3y+12]<(hoặc bằng) 0+4

         4-[3y+12]<(hoặc bằng) 4

Dấu "=" xảy ra khi 3y+12=0

                                 3y=0+12

                                 3y=12

                                   y=12:3

                                   y=4 

Ta có M=4-[5x-2]-[3y+12] 

Suy ra M=4-[5.0,4-2]-[3.4+12]=-20

Vậy m=-20 khi x=0,4 ; y=4

Coi nước biển là 100%

Trong

Hình như thiếu đề bài đó

là kỹ năng; tính cách ; thái độ;......

đây đoán mò đây nha!

 ko chắc cho lắm

thấy hack thêm er

 thì thành hacker => người hack

đoán thế cho zui thôi

ko chắc đâu  nhé

- 1. How many books did Nam have yesterday?

- 2.How much vegetable will they buy tomorrow?

- 3. How much pepper does Mr.Ba need?

- 4. How many bottles of cooking oil did you want to buy?

- 5. How much noodle is here?

- 1, Nam and his brother usually .....play....... tennis in the evening.

- 2. Don't take my plate away! I ......haven't finished ........my dish.

- 3. She ....has lived.... in Paris since 2000.

- 4. A : ....Have.... you ....seen.... the film Harry Potter yet?

B : Yes, I .....have already seen... it.

A : When ...did... you ...see... it?

B : I ...saw... it last year.

- 5. What time ...did... you ...get... to work this morning?

- 6. I ...have had... these shoes since my 12th birthday.

- 7. A : Let's go out.

B : Look. It ...is snowing... outside. It ..comes... down quite hard.

- 8. A : Are you free on Friday?

B: No. We're very busy now. We ......are going to have... a party on Sunday.

- 9. My sister ...loves collecting..... photos of famous singers but she says she ...won't continue... this hobby in the future.

- 10. We ....have been... good friends for ages.

- 11. Tom ..ran... away from home. But he came back 2 days later.

- 12. It's ages since we last ...had.. a party.

Minh is my new classmate. He now staying ............with............... his brother in Ha Noi but he's .........in........... Bac Giang Town and his parent still ..........live.......... there. Minh's brother house is smaller ........than......... his house in Bac Giang, and it is on Xuan Thuy Street. Our .......house....... is in the center of Ha Noi, so .......it........ is about 8 kilometers from his new house .........to....... school. Everyday Minh ( - Chỗ này bạn sai chính tả, tớ sửa lại nhé :)) goes to school .....by..... bike. Minh is unhappy because he ( - Chỗ này cũng sai chính tả :)) doesn't .....have..... many friends in Ha Noi. He also ........misses......... his parents and his friends in Bac Giang.

240    
nha bn tick nha cam pn nhiu:))^_^

bài này tớ nghe chán rồi có cần phải đăng ko

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