Đáp án:
Vd :
x/3=y/5=2
⇒x/3=2 và y/5=2
⇒x=6 và y= 10
Giải thích các bước giải:
Như vậy bài làm ko rõ ràng,và khi thi ko đc điểm cao nhé
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Viết đoạn văn ngắn nêu suy nghĩ của em về vẻ đẹp của sự khiêm tốn?
Rút gọn biểu thức (7x+4)^2 - (7x+4).(7x-4)
Tại sao cây mọc ra hoa trước rồi mới ra quả?
Tính: ( 2x + 1) ^3 mng giúp em ạ
Làm hộ mình nhé mình cho câu trả lời hay
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1. Cho tập hợp B = {0,3,6,...,2010} Tính số phần tử của B 2. Lựa chọn phương án đúng: Cho tập hợp A = {a,b,c,d}.Số tập hợp con có hai phần tử của A là: A) 3 B) 4 C) 5 D) 6 3. Tính tổng S = 2 + 4 + 6 + 8 + ... + 98 + 100 Tổng trên bằng: 4. Lựa chọn phương án đúng: Hãy so sánh các tích sau mà không tính giá trị cụ thể của từng biểu thức A = 2000 . 2000 B = 1999 . 2001 A. A > B B. A < B C. A = B
Chia các động từ sau ở dạng V-ing hoặc to V [[ 1. I can’t afford ________________ that car. It is too expensive. (BUY) 2. You should practice ________________ English everyday. (SPEAK) 3. You neglected ________________ the name of your previous employer. (MENTION) 4. You are requested not ________________ in the restaurant. (SMOKE) 5. You are all forbidden ________________ . (LEAVE) 6. Would you mind ________________ down the radio? (TURN) 7. What do you propose ________________ now? (DO) 8. We'd recommend you ________________ your flight early. (BOOK) 9. We start early ________________ getting traffic jam. (AVOID) 10. We enjoy ________________ cartoons. We have a bunch of them in our USB. (WATCH) 11. We decided ________________ that house because it was close to our kids’ schools. (BUY) 12. Uniforms encourage students ________________ confident. (BE) 13. Try to persuade him ________________ . (COME) 14. They suggest ________________ to the beach. (GO) 15. They refused ________________ extra salary. (PAY) 16. They seem ________________ clearly what they're doing. (KNOW) 17. They knew they risked ________________ when they robbed the bank. (BE ARRESTED) 18. They determined ________________ early to avoid the traffic jam. (START) 19. They are pressing us ________________ a quick decision.(MAKE) 20. They anticipate ________________ to bigger premises by the end of the year. (MOVE) 21. The train begins ________________ down near the station. (SLOW) 22. The doctor advises patients ________________ up smoking. (GIVE) 23. The bus keeps on ________________ in spite of the heavy rain. (RUN) 24. The writer clearly intends his readers ________________ with the main character. (IDENTIFY) 25. The test will involve ________________ questions about a photograph. (ANSWER) 26. The President was forced ________________ . (RESIGN) 27. The poor harvest caused prices ________________ sharply. (RISE) 28. The officer ordered them ________________. (FIRE) 29. The letter instructed him ________________ to headquarters immediately. (REPORT) 30. The law can compel fathers ________________ regular payments for their children. (MAKE) 31. The kids offered ________________ the dishes. (DO) 32. The bank strongly resisted ________________ interest rates. (CUT) 33. Thank you for reminding me ________________ the letter. (SEND) 34. She pretends ________________ my friend but she spoke ill of me behind my back. (BE) 35. She failed ________________ the the full score because she was very careless. (GET) 36. She would have hated him ________________ how her hands shook. (SEE) 37. She refused to tolerate ________________ called a liar. (BE) 38. She imagined ________________ into the office and handing in her resignation. (WALK) 39. She finally consented ________________ our questions. (ANSWER) 40. She begged him not ________________. (GO) 41. She admitted ________________ the car without insurance. (DRIVE) 42. She admits to ________________ strict with her children. (BE) 43. Please try ________________ harder, otherwise you will never be successful. (WORK) 44. Please do not hesitate ________________ me if you have any queries. (CONTACT) 45. Parents are obliged by law ________________ their children to school. (SEND) 46. My mother wants me ________________ a teacher. (BECOME) 47. My father allows me ________________ to the theater tonight. (GO) 48. My sister detested ________________ in public places. (EAT) 49. My parents taught me ________________ French food. (COOK) 50. Leave the rice ________________ for 20 minutes. (COOK)
Tính ( 3x^2 - 5xy^3). ( 3x^2+5xy^3)
cho vd về loài trai nuôi để cấy ngọc trai nhân tạo
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