Đáp án:
Giải thích các bước giải:
a) 3x-5/4=0,3-9,11 b)-3/5 : 3/4+0,5x=12
3x-5/4=-8,81 -4/5 +0,5x =12
3x =-7,56 0,5x =12,8
Vậy x=-2,52 Vậy x=25,6
a) 3x-5/4=0,3-9,11
⇔3x =-7,56
⇔x =-2,52=-63/25
b)-3/5 : 3/14 +0,5 . x = 12
⇔-14/5 + 0,5x =12
⇔0,5x =74/5=14,8
⇔x =29,6=148/5
I. Underline the correct word or words to complete each sentence. 1. No one helped Trang to draw a picture. She did it _________ A. yourself B. himself C. myself D. herself 2. The speaking English contest will be held _________ November 10 th . A. on B. in C. at D. since 3. My little brother is ill, I have to stay at home to look after _______________. A. his B. him C. himself D. he 4. I am______________ to buy this house. A. enough rich not B. enough not rich C. not rich enough D. not enough rich 5. The kitchen is a very__________ place to play. A. danger B. dangerous C. dangerously D. more dangerous 6. You must _____________ your homework right away. A. do B. to do C. doing D. did 7. She went to school late this morning __________ she watched TV late last night. A. if B. although C. so D. because 8. She , s very lucky because she has _____________friends. A. a lot of B. lot C. lots D. much 9. Mr Ha was out so Mr Tan_____________ a message for him A. called B. spoke C. took D. taken 10. Let ’ s _____________at the front door A. meets B. meeting C. to meet D. meet 11. Can I speak _____________Hoa. please? A. on B. at C. to D. with 12. She asks her children not to go_____________because of the cold weather A. inside B. outside C. upstairs D. downstairs 13. She spends most of her free time ___________volunteer work. A. doing B. to do C. do D. for doing 14. He enjoys ___________ to music while he’s studying. A. to listen B. listen C. listening D. to listening II. Choose the underlined part which needs corretion. 15. You must not let children playing in the kitchen because it is a dangerous place. A B C D 16. The students ought to learn their lessons careful before the exams. A B C D 17. I decided changing jobs because my boss makes me work overtime. A B C D 18. Why would you rather stay home to go out tonight. A B C D 19. Jim wanted to know could you call him and told him where to meet you. A B C D 20. She didn’t know how to run this machine. so she asked me help her. A B C D III. Choose one suitable preposition to complete the sentence. 21. My mother is very keen___________ growing roses. A. in B. on C. of D. at 22. John is extremely fond ___________music. A. on B. about C. of D. off 23. We thanked them ___________ all their help. A. at B. for C. in D. about 24. Are you interested ___________ a harvest festival? A. in B. on C. at D. of 25. Wine is made ___________ grapes. A. of B. by C. from D. for IV. Choose the word which has the different sound? 26. A. weather B. tennis C. often D. red 27. A. mice B. silly C. English D. guilty 28. A. sock B. sew C. sure D. seem 29. A. cheat B. break C. cheap D. chief 30. A. mechanic B. chemistry C. chicken D. architect V. Choose the word which has the different stress pattern. 31. A. negative B. scholarship C. develop D. purposeful 32. A. ability B. acceptable C. education D. hilarious 33. A. document B. comedian C. perspective D. location 34. A. product B. provide C. promote D. profess 35. A. different B. regular C. achieving D. property V. Choose the sentence which has the same meaning as the first one. 36. They haven’t seen their uncle for ten years A. The last time they saw their uncle was ten years ago. B. Ten years ago, they first saw their uncle. C. Ten years is a long time for them to see their uncle. D. It’s ten years when their uncle first saw them. 37. I’ll be happy to give you a lift. A. Would you mind giving me a lift? B. Giving me a lift will make you happy. C. I’ll be happy if you give me a lift. D. I don’t mind giving you a lift. 38. Hoa is better at English than Linh. A. Hoa isn’t as good at English as Linh. B. Linh isn’t so good at English as Hoa. C. Hoa is worse at English than Linh. D. Linh isn’t as bad as English as Hoa. 39. I last saw Bob when I was in Ho Chi Minh City. A. I haven’t seen Bob since I was in Ho Chi Minh City. B. I haven’t seen Bob when I was in Ho Chi Minh City. C. I haven’t seen Bob while I was in Ho Chi Minh City. D. I haven seen Bob since I was in Ho Chi Minh City. 40. Peter spent three hours repainting his house. A. It takes Peter three hours to repaint his house. B. It took Peter three hours repainting his house. C. It took Peter three hours to repaint his house. D. It took Peter three hours to repainting his house. ( Các cao nhân giúp mình với mình sẽ cho câu trả lời hay nhất, Cảm ơn )
Có bạn nào giỏi anh giúp mk vs mk cảm ơn👏👏👏
Câu 1: Hằng ngày, gia đình em thường sử dụng những thức ăn gì cho các bữa ăn? Hãy kể tên và cho biết những thức ăn đó thuộc các nhóm nào? Trình bày cách thay thé thức ăn để có bữa ăn hợp lý? Câu 2: Em phải làm gì khi phát hiện: a. Một con sâu trong bát canh? b. Một số con mọt trong túi bột? Câu 3: Sau đây là những thực phẩm được mua sắm để chế biến món ăn: thịt bò, tôm tươi, rau cải, cà chua, giá đỗ, khoai tây, chuối, nho...Em hãy cho biết biện pháp bảo quản thực phẩm trên để chất dinh dưỡng không bị mất đi trong quá trình chế biến và sử dụng. Câu 4: Gia đình em thường sử dụng những phương pháp nào để chế biến thực phẩm? Cho ví dụ minh họa Câu 5: Hãy trình bày cách chế biến một món ăn mà em yêu thích.
4(x+3)=x-12 giúp mình
Mấy anh chị giúp em câu này với ạ
Làm giúp mk câu 9 và tập làm văn
XI- Make a cross on the correct answer A, B, C, or D in the following sentences : (chưa) 1- Air _______________ is often seen as a major environmental result of modern living. A. pollution B. smoke C. fume D. sewage 2- These vegetables are poisonous; they are _____________________ . A. eatable B. adible C. inedible D. eaten 3- ________________ are used to kill insects and weeds so as to help crops grow better. A. Pesticides B. Dynamite C. Treasures D. Creatures 4- We can protect our environment save a lot of money by buying ___________________ products. A. used B. recycled C. waste D. recycling 5- If we plant more trees along the streets, we ___________ the amount of pollution in the atmosphere. A. reduce B. reduced C. will reduce D. would reduce 6- The baby laughed ____________________ when her mother told her a funny story, A. happy B. happiness C. unhappy D. happily 7- Tuan spoke English ____________________, but he didn’t win first prize in the competition, A. unwell B. good C. well D. bad 8- I failed my exam. I worked really hard for it. I’m so _________________________ . A. disappointment B. disappoint C. disappointed D. disappointing 9- ___________________ the pollution in that river is awfully bad, the water is not fit to drink. A. Because of B. Since C. When D. Although 10- We _________________ up our neighborhood when that conservationist arrived. A. cleaned B. cleaning C. are cleaning D. were cleaning 11- While Hoa was picking up the broken plates, she ____________________ her finger. A. cut B. was cut C. was cutting D. is cutting 12- I fell and hurt myself ___________________ I was playing tennis. A. while B. during C. if D. because 13- Keep ______________ your mother for a valuable gold ring until she says yes. A. asking B. to ask C. and ask D. ask 14- We are really looking forward _________________ you again. A. to see B. seeing C. to seeing D. for seeing 15- This man __________________ 50,000 VND yesterday for cutting down the trees in the forest. A. was fine B. has been fined C. fined D. was fined
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Tìm số hạng không chứa x trong khai triển của ( x^2-1/x)12
Câu 1. .Kết luận nào sau đây là đúng? A. – (– 2) = 2 B. |– 2| = – 2 C. – (– 2) = – 2 D. – | – 2| = 2. Câu 2. Kết qủa của ( - 27) - ( - 19) bằng: A. - 8 B. 46 C. - 46 D. 9 Câu 3. Cho (-11) - x = 8 , số x bằng: A. 3 B. -3 C. 19 D. -19 Câu 4. Tìm x, Biết : 2 + x = - 15 + 20 A. x = – 7 B. x = 7 C. x = -3 D. x = 3.
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