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5 tháng 11 2017

\(\dfrac{3}{4}-4\left|x-1\right|=\dfrac{-13}{4}\)

\(\Leftrightarrow4\left|x-1\right|=4\)

\(\Leftrightarrow\left|x-1\right|=1\)

\(\Leftrightarrow\left[{}\begin{matrix}x-1=1\\x-1=-1\end{matrix}\right.\) \(\Leftrightarrow\left[{}\begin{matrix}x=2\\x=0\end{matrix}\right.\)

Vậy ..

b/ \(17,5-2,5x=3,6x\)

\(\Leftrightarrow17,5=3,6x+2,5x\)

\(\Leftrightarrow17,5=6,1x\)

\(\Leftrightarrow x=\dfrac{17,5}{6,1}\)

Vậy ..

11 tháng 10 2017

\(1,3x^2+3x-6=3x^2-3x+6x-6=\left(3x^2-3x\right)+\left(6x-6\right)=3x\left(x-1\right)+6\left(x-1\right)=\left(x-1\right)\left(3x+6\right)\)

11 tháng 10 2017

\(2,6x^2-13x+6=6x^2-4x-9x+6=\left(6x^2-4x\right)-\left(9x-6\right)=2x\left(3x-2\right)-3\left(3x-2\right)=\left(3x-2\right)\left(2x-3\right)\)

3 tháng 8 2019

Sắp xếp các câu sau theo thứ tự từ 1-10 sao cho đoạn hội thoại thích hợp

A. I don't know but I'll do anything. I'm good with may hands and I'm a hard worker.

B.I'm going to ask you some questions, OK? What kind of jobs have you had?

C. Thank you very much.

D. Why did you leave it?

E.What did you do there?

F. Next, please!

G. I used to cut sheets of plastic.

H. My family moved to this city at the beginning of this year and I need to change my job.

I. The last five year, I worked in a plastic factory.

J. What do you want to do here?

K. Why don't you fill out an application in the office. It looks like we're going to have an opening next week. I'll call you.

Điền: 1__B___ 2___I ___ 3___E___ 4___G_ 5__D_____ 6____H____ 7_____J___ 8____A____ 9____K____ 10_____C____

3 tháng 8 2019

1-11 bạn j đó ơi. chứ không phải 1-10 đâu mik viết sai đề. làm lại cho mik vs

30 tháng 1 2022

A  Let's see. We want to make spaghetti bolognese. Is there 1_any______ spaghetti on the shelf?

B  Yes, there's a whole packet.

A  Fine. How 2 much beef do we need?

B  About 500 grams.

A  Well, there isn't 3 much in the fridge.

B  OK, so we need to buy 4_some __ beef!

A  And vegetables! How 5 many carrots, tomatoes and onions do we need?

B  I know we've got 6__some__ carrots. How 7 mucg tins of tomatoes do we need?

A  One tin is fine.

B  OK, we've got two.

A  And onions? Are there 8_any__ onions in the cupboard?

B  Yes, there are! 

30 tháng 1 2022

2 much 

3, any

4,some

5,many

6,some

7,many

8,any

III. Choose the word whose underlined part is pronounced differently from the rest in each group. (1 p)1. A. meatB. greatC. heatD. bean2. A. switch  B. matchC. catchD. stomach 3. A. days      B. staysC. saysD. plays4. A. pearB. clearC. dearD. hear5. A. beefB. needC. greenD. coffeeWrite your answer here1 __________2___________3___________4 ___________5___________SECTION 3: LEXICO –  GRAMMAR.IV. Choose the best answer to complete each sentence, identify your answer by circling the corresponding...
Đọc tiếp

III. Choose the word whose underlined part is pronounced differently from the rest in each group. (1 p)

1. A. meat

B. great

C. heat

D. bean

2. A. switch  

B. match

C. catch

D. stomach 

3. A. days      

B. stays

C. says

D. plays

4. A. pear

B. clear

C. dear

D. hear

5. A. beef

B. need

C. green

D. coffee

Write your answer here

1 __________

2___________

3___________

4 ___________

5___________

SECTION 3: LEXICO –  GRAMMAR.

IV. Choose the best answer to complete each sentence, identify your answer by circling the corresponding letter A, B, C, or D. (5ps)

1.How are your friends? – _______

A. They’re twelve years old.

B. They’re students

C. They’re very nice.

D. They’re in my class.

2. I often watch TV ______ night.

A. on       

B. in                     

C. for                         

D. at

3. How ______ to school every day? – They walk to school every day.

A. are they go      

B. do they go      

C. often do they go  

D. do they walk

4. Maria ______ a lot of new friends in her new school now.

A. makes      

B. make               

C. is making             

D. making

5. Mai likes her new gloves very much because they fit her ___________.

A. fingers       

B. eyes                

C. hands                    

D. feet

6. What is your favorite food?

A. I favorite chicken

B. My favorite food chicken

C. Chicken favorite me

D. I like chicken best

7. Where can we cross the road? – Use the _________________.

A. crossing pavement

B. zebra crossing

C. passenger way

D. foot bath  

8. When she gets good marks, her parents often feel ___________.

A. hungry       

B. thirsty            

C. happy                   

D. worried

9. Of the three students, Nga is ___________.

A. the best       

B. good               

C. better                    

D. well

10. Miss Mai always ___________ her own clothes.

A. does       

B. wants                   

C. cooks                    

D. makes

11. My brother ___________ the answer to the question now.

A. know       

B. knows            

C. to know                

D. is knowing

12. Where are the ___________ ? On the table

A. childrens’ books

B. children books

C. books’ children

D. children’s books

13. These are our books and those are____________.

     A. you

B. your

C. yours

D. their

14. Listen! The news on the radio_____________very interesting.

    A. are

B. is

C. be

D. has

15. Miss Lan is ______ .

    A. a young tall beautiful lady

B. a tall young beautiful lady

    C. a beautiful young tall lady

D. a beautiful tall young lady

16. Each girl and each boy ______ the piano at the moment.

    A. play      

B. plays         

  C. are playing

D. is playing 

17. What’s her job? She’s ______ lecturer.

    A. an university   

B. a university         

C. one university

D. university

18. What would you like to drink? – “_________________”

A. Thank you                

B. Yes, please             

C. No, I don’t              

D. Tea, please

19. They’ve got__________books than me.

A. fewer          

B. less                          

C. much                     

D. many

20. Does she want__________her grandparents at weekends?

A. visit                      

B. visits                         

C. visiting                

D.to visit.

21. He __________drive too fast because it is very dangerous.

A. should not  

B. don’t should           

C. should                 

D. not should

22. She is not doing __________in the garden, just walking with her dog.

A. anything                     

B. nothing                    

C. something           

D. one thing

23. At an intersection, we must____________.

A. ride quickly               

B. go fast                      

C. slow down                       

D. run out

24. ____________ going to the museum?

A. Let’s         

B. Why don’t             

C. How about          

Do you want

25. Lan: How about having dinner at the Green Garden Restaurant?

       Hoa: ______________

A. Yes, I do                                                             

B. No, I’m not going 

C. Sorry, I’m going to another party                

D. A great idea

26. Smoking is harmful _____________ your health.

A. for                              

B. on                              

C. about                    

D. to

Write your answers here

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

20.

21.

22.

23.

24.

25.

   

VGive the correct forms of the verbs given in brackets. (1p)

1.Eating fruit and vegetables every day (be)__________very healthy.

What do you intend to do this weekend?

2. We (plant) _________ some trees and flowers around our school yard.

3. Mrs. Lien can’t watch TV because she (cook)________the dinner in the kitchen.

4. She (not go)___________to school by bus in the morning.

5. How often your mother (play)__________tennis?

Write your answers here:

1 _________

2___________

3___________

4 ___________

5___________

VI. Give the correct form of the words in capital to complete the sentences. (1p)

1. It’s very ____________to live in a small room.

COMFORT                                  

2. We’d like a nice___________orange.

3. She often feels ____________when she gets bad marks.                       

4. I have __________time to play than my friend.

5.What is the correct_________ of this word?                          

JUICE

HAPPY.                

LITTLE

PRONOUNCE

Write your answers here:

1 .

2.

3.

4.

5.

 

VII. Circle the letter A, B, C or D before the mistake in each sentence and correct it. (1p)                  

  1. Do you know how much a dictionary cost ?

                    A                 B    C                      D

  1. I go to the library three times every week.

            A                      B      C        D

  1. Viet do not get up early and do morning exercises every morning.

                  A                  B            C                        D

  1. That’s my father over there. He stands near the window

        A                                  B              C                    D

  1. How do you go to see the dentist? – Once or twice a month.

          A                      B                                  C                         D

Write your answers here:

1 _________

2___________

3___________

4 ___________

5___________

SECTION 4: READING

VIII. Read the passage. Then choose one suitable word to fill in the gaps. (2ps)

I live in a small (1)_________, Henfield – there are about 500 people here. I love it because it is (2) _______ and life is slow and easy. You (3) ________ have to queue in shops or banks. The village is clean – people look after it and (4) ______ their rubbish in the streets. The air is also (5) _______ because there’s not much heavy traffic. It’s much more (6) _______ here than in a city. Everyone knows everyone and if someone (7) _______ problem, there are always people who can help. There are (8) _______ things I don’t like about Henfield. One thing is that there’s not much to do in the evening – we haven’t got any cinemas (9) _______ theaters. Another problem is that people always talk about each other and everyone knows (10) ________ everyone else is doing. But I still prefer village life to life in a big city./.

1. A. town

B. city

C. village

D. capital

2. A. quite

B. quiet

C. noisy

D. noisily

3. A. can’t

B. should

C. not

D. never

4. A. don’t throw

B. throw

C. not throw

D. throwing

5. A. dirty

B. not clean

C. clean

D. nice

6. A. friendly

B. unfriendly

C. boring

D. uninteresting

7. A. have

B. are

C. has

D. get

8. A. much

B. a little

C. a few

D. many

9. A. and

B. or

C. but

D. because

10. A. who

B. where

C. how

D. what

Write your answer here

1________

2________

3. ________

4. ________

5________

6. ________

7________

8________

9. ________

10________

IX. Read the following passage, then answer the questions by circling A, B, C or D. (1p)

Henry and Bill are brothers. Henry is twelve and Bill is ten. They live with parents and their dog in a small town in the south of England. They do not look like each other. Henry is tall and dark and Bill is short and fair. They also like different things. Henry likes sports but he is not interested in school. He hates Math and History and he never remembers the numbers. Bill likes to go to school. He is good at English and he reads and writes a lot. Bill can draw very well, too. But he never plays sports. He spends most of his time indoors reading or drawing. He wants to be a writer or an artist.

1.Henry is Bill’s____________.

A. brothers

B. younger brother

C. older brother       

D. friends

2. There are ____________people in their family.

A. three

B. four                       

C. five                                   

D. six

3. Which of the following statements is not true?

A. Henry and Bill are different from each other.

B. Bill learns English very well.

C. Henry likes school very much.

D. Bill wants to be a writer or an artist.

4. Bill is good at____________

A. English

B. drawing                

C. playing sports     

D. Both A&B

5. Henry never remembers the numbers because____________.

A. he doesn’t like Math.

B. he wants to study History.        

C. he thinks Math is difficult.

D. he is interested in school.

Write your answers here:

1 _________

2___________

3___________

4 ___________

5___________

X. Fill in each blank with ONE suitable word. (2ps)

          Of all my relatives, I like my aunt Emily the (1)__________ She’s my (2) _________ youngest sister. She has never married and (3) __________alone in a small village near Bath. She’s fifty years old, (4) __________she’s quite young in spirit. She has a fair complexion, thick brown hair and dark brown eyes. She has a kind face, and when you meet (5) __________, the first thing you notice (6) __________her smile. Her face is a little wrinkled now, but I think she is still rather attractive. She is the sort of person you can always go to if you (7) _________a problem and she’s extremely generous. She likes reading (8) _________gardening, and she still goes (9) __________ long walks over the hills. I hope I’m as active as she is when I’m at her (10) __________ .      

Write your answer here

1________

2________

3. ________

4. ________

5________

6. ________

7________

8________

9. ________

10________

SECTION 5: WRITING

XI. Rewrite each of the following sentences in such a way that it means the same as the first one. (2ps)

1/ Our school has forty-two classrooms.                         

-> There………………………………………………………………………………

2/ The bakery is to the left of my house.                         

-> My house ……………………………………………………………………………

3/ Mr Minh has a son, Trung.                                

-> Mr Minh ……………………………….……………………………………………

4/ Huyen walks to school every afternoon.        

->  Huyen goes …………………………………………………………………………

  1. He goes to work at seven fifteen.

-> He goes to work at a …………………………………………………………………

  1. Is this the best television you have?

->Do you……………………………………………………………………………..?

  1. Jenifer’s hair is long. It is straight and brown.

 Jenifer has…………………………………………………………………………..

  1. Let’s go to the restaurant for dinner tonight.

-> What about………………………………………………………………………….?

  1. How much is this school bag?

 -> What …………………………………………………………………………….?

  1. Mr. Nam owns that motorbike.

à That motorbike ………………..………………………………………………….

XII. Use the suggested words to make meaningful sentencesMake any changes if necessary (2ps)

  1. Tom / often / play soccer / fall / but / sometimes / sailing.

……………………………………………………………………………………

  1. Look / her / . / What/ she/ wear/ present / ? /

…………………………………………………………………………………?

  1. Many/plants/ animals/ danger/ because/ we/ destroying/ environment.

……………………………………………………………………………………

  1. Every/ afternoon/ school/ Nam/ housework/ listen/ music.

……………………………………………………………………………………

  1. Our apartment / have / five rooms /and/ it/ sixth floor/ the building.

……………………………………………………………………………………

1
26 tháng 2 2022
J Ghhhhggfd

11

a) Sửa đề: C/m tứ giác BEHC nội tiếp
Xét tứ giác BEHC có 

\(\widehat{BEC}=\widehat{BHC}\left(=90^0\right)\)

\(\widehat{BEC}\) và \(\widehat{BHC}\) là hai góc cùng nhìn cạnh BC

Do đó: BEHC là tứ giác nội tiếp(Dấu hiệu nhận biết tứ giác nội tiếp)

2 tháng 6 2022

a) Sửa đề: C/m tứ giác BEHC nội tiếp
Xét tứ giác BEHC có 

BEC^=BHC^(=900)

BEC^ và BHC^ là hai góc cùng nhìn cạnh BC

Do đó: BEHC là tứ giác nội tiếp(Dấu hiệu nhận biết tứ giác nội tiếp)

14 tháng 3 2021

Phép nhân hoá:

Ví dụ: Bác gấu đang bảo vệ những chú hươu khỏi đàn sói hung ác

14 tháng 3 2021

Bông hoa ngã xuống, tàn lụi như đống tro tàn.

28 tháng 2 2021

- Bước sang thế kỉ XVI, triều đình nhà Lê càng suy yếu thì sự tranh chấp giữa các phe phái phong kiến càng diễn ra quyết liệt.

- Mạc Đăng Dung vốn là một võ quan. Lợi dụng xung đột giữa các phe phái, đã tiêu diệt các thế lực đối lập, thâu tóm mọi quyền hành, cương vị như Tể tướng.

- Năm 1527, Mạc Đăng Dung cướp ngôi nhà Lê, lập ra triều Mạc (Bắc triều).

- Năm 1533, một võ quan triều Lê là Nguyễn Kim chạy vào Thanh Hoá, lập một người thuộc dòng dõi nhà Lê lên làm vua, lấy danh nghĩa "phù Lê diệt Mạc", sử cũ gọi là Nam triều để phân biệt với Bắc triều (nhà Mạc ở phía bắc).

=> Cục diện Nam - Bắc triều hình thành.

28 tháng 2 2021

Bước sang thế kỉ XVI, triều đình nhà Lê càng suy yếu thì sự tranh chấp giữa các phe phái phong kiến càng diễn ra quyết liệt. Mạc Đăng Dung vốn là một võ quan. Lợi dụng xung đột giữa các phe phái, đã tiêu diệt các thế lực đối lập, thâu tóm mọi quyền hành, cương vị như Tể tướng. Năm 1527, Mạc Đăng Dung cướp ngôi nhà Lê, lập ra triều Mạc (Bắc triều). Năm 1533, một võ quan triều Lê là Nguyễn Kim chạy vào Thanh Hoá, lập một người thuộc dòng dõi nhà Lê lên làm vua, lấy danh nghĩa "phù Lê diệt Mạc", sử cũ gọi là Nam triều để phân biệt với Bắc triều (nhà Mạc ở phía bắc).

29 tháng 12 2022

C.75 min