tìm x bt: x(2x – 1)(x + 5) – (2x^2 +1)(x + 4,5) = 3,5 mình cần gấp huhu

cho etan tác dụng clo với tỉ lệ 1:1 ( ánh sáng khuếch tán) cho tối đanbao nhiêu dẫn xuất monoclo?

Tính hợp lý C= 2019-2-4-6-........-100

Cho bảng ô vuông gồm 10 dòng và 10 cột. Hai bạn Tín và Nhi tô màu các ô, mỗi ô một màu trong 3 màu: xanh, đỏ, tím. Bạn Tín bảo: "Lần nào tô xong hết các ô cũng có 2 dòng mà trên 2 dòng đó có một màu tô số ô dòng này bằng tô số ô dòng kia". Bạn Nhi bảo: "Tớ phát hiện ra bao giờ cũng có 2 cột được tô như thế". Nào, bạn hãy cho biết ai đúng, ai sai?

tìm các số guyên dương a,b,c thỏa mãn a^3+3a^3+5=5^b và a+3=5^c lm dc mik vote 5 sao

Choose the sentence which has a similar meaning to the first one. Question 24. While I sympathize with your problem, there is nothing I can do to help. A: I can’t do anything for you, though I understand what you are going through. B: I would like to help you sort out this problem, but I won’t. C: Since I have no idea about your problem, I cannot be of any assistance. D: Perhaps I can help you if you tell me more about your problem.

Cho xOy có số đo là 90° điểm A nằm trong đó vẽ B đối xứng vs A qua Ox vẽ C đối xung vs A qua Oy So sánh OB và OC Chứng minh ba điểm B,O,C thẳng hàng

Ex1. Choose a word which has the underlined part pronounced differently from the rest 1. A. leave B. break C. repeat D. peaceful 2. A. photo B. going C. brother D. home 3. A. writes B. makes C. takes D. drives 4. A. guest B. gathering C. generous D. great Ex2. Choose the best replies for the questions: ( 1 point) A B Your answer 1. How is your first week at school? 2. Where is the cat? 3. Would you like to have a picnic? 4. What shall we do this afteroon 5. Can you tell me the way to the beach? a. Yes, I’d love to. b. Oh, wonderful. c. It’s under the table. d. Yes, First go straight. Then turn right. e.Let’s go out and have an ice-cream. 1. ………… 2. ………… 3. …………. 4. ………… 5. ………… Ex 3 Read the email and answer the following question.: ( 1,0 point) Dear Phong, I’m sorry I couldn’t write to you early because I was very busy. Now, we’re staying in a small hotel near a shopping area in District 10. Near my house, there is a cinema, a post office, a supermarket and some cafes. There are some big shops at the end of the street. It is also very noisy here because there’s always a lot of traffic day and night. In my hometown, I live in a quiet street, there are some small shops, a school and a post office in my neighbourhood but there isn’t a park and a cinema. The streets are narrow but they are cleaner and there isn’t so much traffic. The air is much fresher, too. And every house has a backyard and a frontyard. Love, Nam. 1. Why is it very noisy around his hotel? ............................................................................. 2. What are the streets in his neighbourhood like? ……………………………………….. 3. Is there a park in his neighbourhood? ............................................................................... 4.What are the houses in his neighbourhood like? ............................................................... Ex4. Put the verbs in brackets in the correct tense form 1.School(finish)---------------- at 4.30 pm every day. 2.------------you often (eat) -------lunch in the school canteen? 3.Listen! -------------they (sing) ---- in the classroom? 4.My family kike (spend)…………. our summer holidays at the seaside. 5.She (have) ------------- long black hair. 6.My father (be)------------- very kind. 7.I (go)------------ to the cinema with my sister this evening. 8.What ---------- your brother (do)-----------now? He (practice)-------- speaking English. Ex5. Write sentences, using the comparative or superlative forms of the adjectives 1. Mai/intelligent/Kien 2. My brother/strong/my sister. 3. Life in the city /exciting/ life in the countryside. 4. Doing our homework/important/ reading a novel. 5. Ho Chi Minh City/big/Ha Noi capital. 6. Mount Everest/the/high/the world. 7. Ba Be Lake/the/large/in Viet Nam. 8. Mekong River/the/long/ in Viet Nam. 9. Uluru / the/ beautiful/mountain/ Australia 10.Lan/the/good/English/my class.

Vì sao gọi Đàng Trong là chính quyền còn Đàng Ngoài lại gọi là nhà nước phong kiến vậy ạ?

Trình bày cuộc khởi nghĩa Yên thế (thời gian ,lãnh đạo, căn cứ tóm tắt diễn biến ,ý nghĩa )cho biết cuộc khởi nghĩa này có những đặc điểm gì khác so với các cuộc khởi nghĩa khác