Find the word which has different sound in the part underlined.

1. A. advice B price C. nice D. police ( A , B , C . D đều gạch chân dưới chữ i nhé)

2. A. stamps B desks C. rubbers D. cats ( A , B , C . D đều gạch chân dưới chữ s)

3. A. couches B. boxes C. houses D. tables ( gạch chân dưới es )

4. A lunch B computer C . calculator D. uniform ( gạch chân chữ u )

5 A. great B. cheap C. peace D. meal ( gạch chân dưới ea )

Tập giá trị của hàm số y = 2 cos 2 x − 3  là

A. [-5;-1]

B. [-5;-3]

C. [-3;-1]

D. [-4;-1]

Ta có:-51/73=(-51)x101/73x101=-5151/7373

Do đó: hai phân số -51/73 = -5151/7373

tick nha

TÌM LỖI SAI VÀ SỬA LẠI

1.He doesn’t spend enough time to study for his exam=>for his exam to study

2. I enjoy very much=>enjoy listening folk music

3.She goes once a week to college for=>to study computing

5 The job requires someone who can speak fluently Russian=>Russian fluently

6.Electricity cost =>cost exactly the same amount of money than gas

.7. Climbing has fewest => fewer participants than skiing.

8. According to my oppinion, the government should encourage people save =>to save money.

3x + 12 = 2x -4

_ 3x -2x = 12 - 4

x = 16

**** ủng hộ mik nha các bạn mik cảm ơn chúc các bạn học giỏi !

Vì /x-15/ lớn hơn hoặc bằng 0
    /y+20/ lớn hơn hoặc bằng 0
mà /x-15/+/y+20/=0
suy ra /x-15/=0
và       /y+20/=0
suy ra x-15=0
và       y+20=0
suy ra x=0+15
và       y=0-20
suy ra x=15

và y= -20
Vậy x=15
       y= -20

(bạn hãy dùng kí hiệu nhé,vì đánh máy nên tớ không viết ki hiệu được.Nhớ nhấn đúng cho mình)

số lớn ;693

số bé : 456

VII. Hoàn thành các câu hỏi sau:
1. (where / you / go to school?) __where do you go to school__
2. (when / she / arrive?) ________when does she arrive_____
3. (why / he / eat so much?) ________why does he eat so much___
4. (what / they / do yesterday?) _______what did they do yesterday__
5. (who / you / meet at the party?)__who did you meet at the party___
6. (how / she / come to work this morning?) __how did she come work this morning? ___
7. (where / I / leave my glasses?) ____where did i leave my glasses__
8. (when / he / get home last night?) _when did he get home last night?
9. (what / you / do at the weekend?) _what did you do at the weekend?
10. (why / she / get angry?) _______why did she get angry__________
11. (who / they / talk to earlier?) __who did the talk to earlier?__
12. (what / we / do last Christmas?) __what did we do last Christmas?
13. (why / it / rain on my birthday?) ___why does it rain on my birthday?
14. (how / she / finish so quickly?) ___how did she finish so quickly?
15. (where / he / go after the class last week?) ___where did he go after the class last week?____
16. (what / I / do last Tuesday?) __what did i do_last Tuesday?_____
17. (when / you / start your job?) ____when did you _start your job?
18. (how / she / get here?) ____how did she get here?___
19. (why / you / arrive so late?) ____why did you _arrive so late?____
20. (what / he / do last summer?) ___what did he do last summer?__

B=1+2+3+4+5+...+97+98+99

B=(99+1)+(98+2)+...+(56+54)+55

B=100+100+...+100+55(có 49 số hạng 100)

B=100.49+55

B=4950

V. Hoàn thành các câu sau:
1. She ___________went________ (go) home.
2. We _______________watched____ (watch) a film.
3. When _______did he arrive____________ (he / arrive)?
4. I __________bought_________ (buy) a new car.
5. Where ___________do you live________ (you / live)?
6. I ___________play________ (play) tennis.
7. Where __________did you work_________ (you / work) before?
8. ______did they come_____________ (they / come)for lunch?
9. ___________did we study________ (we /study) this last year?
10. They ______drank_____________ (drink) coffee.
11. _______________did you see____ (you / see) that film?
12. We ___________ate________ (eat) dinner.
13. You _____________didn't go______ (not / go) out last night.
14. He ___________studies________ (study).
15. What _______________did you watch____ (you / watch)?
16. We _______didn't call____________ (not / call) you yesterday.
17. They _____________didn't arrive______ (not / arrive) on time.
18. It ____________didnt rain_______ (not / rain).
19. We _________don't drink__________ (not / drink) beer.
20. You ________cleaned___________ (clean) the kitchen.