( √x ²-2x+1) -2=0 (2+ √x) ×(1+ √x)=x+5

Lớp 4A có 35 học sinh, lớp 4B có 33 học sinh cùng tham gia trồng cây. Lớp 4A trồng nhiều hơn lớp 4B 10 cây. Hỏi mỗi lớp trồng được bao nhiêu cây, biết rằng mỗi học sinh trồng được số cây như nhau?

Những chuyển biến về kinh tế xã hội của Việt Nam dưới sự tác động của cuộc khai thác thuộc địa lần thứ nhất

Kể về một kỉ niệm đáng nhớ dài ghi vở

Exercise 3: Read the following passage and use the information provided in the passage to decide which word or phrase A, B, C or D that best describes London. The majority of London's inhabitants live in its suburbs. Many of them travel to the city to work every day by train, bus, tube or car. These people are called "commuters". Commuters may spend as much as two hours every morning getting to work and another two hours getting home again. The cost of living in London is higher than that in most other parts of Britain. Millions of visitors come to London every year from all over the world to see the famous sights here such as Buckingham Palace and many other historic buildings. London is also very famous for its theatres, red buses and black taxis. Some people find it a noisy and dirty place but it has many large, pleasant parks. Here, everyone can enjoy some peaceful and quiet moments. London has many attractions both people from other parts of Britain and people from overseas. 1. In London ................... . * A. more people live in the suburbs than in the city center. B. most people live in the suburbs than in the city center. C. less people live in the suburbs than in the city center. D. many people live in the suburbs than in the city center. 2. Commuters ................... . * A. live in the city center. B. live in the suburbs and travel to work in the city. C. live in the suburbs and work there. D. live in the city center and work there. 3. Living in London is ................... . * A. cheaper than in most other parts of Britain. B. more expensive than in most other parts of Britain. C. most expensive than in most other parts of Britain. D. more cheap than in most other parts of Britain. 4. London is famous for ................... . * A. its delicious food. B. its theatres but not its red buses. C. its theatres, red buses and black taxis. D. its inhabitants. 5. The attractions of London are ................... . * A. for the Londoners only. B. only for people from other parts in Britain. C. just for foreigners. D. both for foreigners and for people from other parts in Britain.

Tính giá trị biểu thức sau: `\frac{3cot60^0}{1+sin60^0}+``\frac{1}{tan30^0}`

Rút gọn Mọi người giúp mình với!(hứa sẽ vote 5 sao)

Chép tranh dưới đây, giống khoảng 85% hộ mình nhé. NL : ↓ ↓ (Phần "hỏi chi tiết")

I. Put each verb in brackets into an appropriate verb form. Ask hundreds of people what they (0) …..plan/ are planning….. (plan) to do on a certain day in August next year, or the year after, and there (1) ………… (be) only one reply. Provided of course that the people you (2) ……… (ask) (3)………… (belong) to the Elvis Presley Fan Club. Although the King of Rock and Roll (4…….……… (die) nearly two decades ago, his fans (5) ……… (meet) every year since then outside his home in Memphis, Tennessee, to show respect for the singer they (6) …………… (love) so much. Fans like Jean Thomas, from Catford in South East London. Jean (7)……… (visit) Gracelands, the house where Elvis (8) …….…………… (suffer) his fatal heart attack, twice in the past five years. “The first time I (9).…………… (borrow) the money from my Mum, as I (10) ………….…………… (not / work) then. But two years ago I (11)…….…………… (get) married and since then I (12) ……………………………….………… (work) in my husband Chris’s garage. Chris and I (13)…… (go) together last year, and we (14)…….…… (think) of spending two or three months in the USA next year. Mọi ng giúp em vs ạ!! E cảm ơn

Câu 1. Phân tử khối của hợp chất BaSO4 bằng A. 136 đvC. B. 233 đvC. C. 185 đvC. D. 740 đvC. Câu 2. Hợp chất A trong phân tử gồm có 2X, 1S, 3O liên kết với nhau (X là nguyên tố chưa biết), biết phân tử chất A nặng bằng 7 lần phân tử nước. Công thức hóa học của A là A. Na2SO3. B. K2SO3. C. Na2SO4. D. CuSO3. Câu 3. Hợp chất R được tạo bởi nguyên tố Y (hóa trị II) với nhóm (NO3) (hóa trị I). Biết trong R, nguyên tố Y chiếm 35,556% khối lượng. Công thức hóa học của R là A. Zn(NO3)2. B. Cu(NO3)2. C. Ba(NO3)2. D. Mg(NO3)2. ( Làm tự luận nhé )