Một máy bơm chuyển được 1,2m 3 nước từ dưới sông lên cao 5m trong 2 phút. a, Tính công suất của máy bơm b, Tính công thực hiện được trong 1 giờ

Cho pt : x^2 -4x +m-3 =0 (*) ( m là tham số ) Tìm các giá trị của m để A = x^2_1 +x^2_2+x2^_1.x^2_2( sử dụng định lý vi -ét)

giúp mình với, gợi ý thôi cũng được ạ

Giải toán phân tích A(x).B(x)=0

1)Bức tranh thiên nhiên trước khi vượt thác được thể hiện qua những chi tiết nào? Câu hỏi trong Văn bản Vượt Thác lớp 6

Bạn Bảo có 26 viên bị, bạn Bảo có ít hơn bạn Phúc 8 viên bị, bạn Ngân có nhiều hơn bạn Phúc 5 viên bị. Hỏi bạn Ngân có bao nhiêu viên bi Giúp mình với

Cho tam giác ABC có AB>AC.Trên cạnh AB lấy điểm D sao cho góc ACD=góc ABC.Chứng minh AC mũ 2=AD.BC

I. Find the word which has a different SOUND in the part underlined. 1. A. rUsty B. pronUnciation C. Up D. confUsion 2. A. rEAsonably B. mEAn C. brEAthtaking D. spEAker 3. A. Accent B. mistAke C. operAte D. communicAtion II. Find the word which has a different STRESS in the part underlined. 4. A. factor B. bilingual C. imitate D. openness 5. A. translate B. mistake C. dictionary D. official 6. A. flexibility B. multinational C. inaccessible D. expensive III. Choose the correct answer to complete the sentences. 7. If only I ................... more careful, I might be better at getting good marks. A. am B. were C. be D. been 8. When I worked in Canada, I could communicate with people there in French but now I’m a ..................... rusty. A. many B. much C. little D. some 9. English today is the most ..................... spoken language in the world. A. widely B. early C. quickly D. largely 10. When we don’t know what an English word means, we often look it ...................... in an English-vetnamese dictionary. A. on B. in C. at D. up 11. Mai can speak Chinese much more ................. than her brother can. A. fluent B. fluently C. fluency D. more fluently 12. The picture reminds him of the time ...................... he studied in Bangkok. A. which B. where C. when D. while 13. They could understand our conversation if they .................. some English. A. knew B. would know C. will know D. know 14. Ly has worked for a bank in London for 3 years and she speaks English ................... A. by well very now B. very well by now C. very by well now D. by very well now 15. In some countries, besides their ................... tongue, students have to learn another language. A. official B. second C. mother D. first 16. If Tuan .................... to England, it will be a good opportunity for him to improve his English. A. comes B. came C. has come D. will come IV. Find the underlined part that needs correction. 17. She can’t SPEAK a word WITH Japanese BECAUSE she finds it REALLY HARD to understand. A B C D 18. My friend - Jane HAS LEARNT Vietnamese FOR 3 years, SO she is fluent AT Vietnamese. A B C D 19. Her family HAS A cat WHO has three KITTENS. A B C D 20. It IS SAID that MANY English words HAVE BEEN SIMPLE over the centuries. A B C D GIÚP MÌNH VỚI Ạ

Complete the sentences with the appropriate present tense of the verbs in brackets. 13. Since its beginning more than a century ago, the slouch hat one of the most distinctive items of Australian clothing. (become) 14. For over 130 years, Akubra hats its legendary stories in Australia. (make) 15. Aberdeen in Scotland an important centre for the oil industry since the finding of oil in the North Sea. (become) 16. Canada the longest land border in the world with the United States.(share) 17. Ireland the Eurovision Song Contest seven times. (win) 18. In Canada you should maintain eye contact while you hands. (shake) 19. Listen! Can you hear those people next door? They ____ ________(yell) 20. Higher education in the US (begin)_________in 1636 when the first colonists (found) ________Harvard College.

các bác ưi vẽ choa e 2 hoặc 1 pé nhoa vẽ cả 2 bức cs màu thì e choa 5* + ctlhn lun (các bác k đc cóp lại ảnh k đc vẽ ađ nha) dài dòng cho add khỏi xóa chứ k cs nhìu iu cầu đâu ^V^