cho pt : 3x^2-2x+2m-5=0 a, Tìm m và nghiệm còn lại biết 1 nghiệm = (-2) b, Tìm m để pt có hai nghiệm còn lại Giúp mình phần b là chính nha, a ko tính nhưng mình đăng nếu có liên quan thì mn vận dụng nha

Một máy bay đang bay với một vận tốc không đổi và ở một độ cao không đổi so với mặt đất. Đối với người ở mặt đất thì hành khách trên máy bay: A. không có cơ năng. B. chỉ có động năng. C. chỉ có thế năng. D. có cả thế năng và động năng.

Tính số gam Kali clorat (KClO3) cần thiết để điều chế được 4,032 lít khí oxi ở đktc.(K = 39, O = 16, Cl = 35,5) A. 14,7 gam B. 71,4 gam C. 15,4 gam D. 17,4 gam.

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I. Choose the word or phrase that best completes each sentence (4pts): 1.Did you make a cushion for your armchair? - .......................... A. Yes, I am B. Yes, I do C. Yes, I did D. Yes, I was 2. I need ..........................your temperature. A. take B. to take C. taking D. took 3. Nam has a cavity in his tooth so he is going to the ........................... A. nurse B. teacher C. doctor D. dentist 4.We ..........................at home last Sunday. A. stay B. stayed C. to stay D. staying 5. Mr. Robinson bought Liz a cap in the ………………… A. souvenir shop B. museum C. theater D. stadium 6. Yesterday, they had a ………….. check-up. A. medicines B. medicines C. medically D. medical 7. … does Minh feel nervous? – Because he has to see a doctor. A. When B. Why C. How D. What 8. She got 10 marks in English yesterday so she … very happy yesterday. A. is B. were C. was D. are II. Read the passage and fill in the blanks with given words in box (3pts) explains, how, reminds, survey, kind,scared Dr. Lai is a dentist. She looks after children’s teeth. Dr. Lai’s ________is clean and tidy, so is her uniform. Most children are________ when they come to see Dr. Lai, but she is a ________ woman. She________ what will happen so they are nor afraid. Dr. Lai often gives children advice. She tells them________ to look after their teeth. She ________ them to brush their teeth regularly and eat sensibly III. Choose the best sentences (1,5pt):Chọn câu đúng: 1. Liz/ NhaTrang/ to/ last month/ went / for the holiday/ . A. Lan went to for the holiday Nha Trang last month. B. Lan went for the holiday last month to Nha Trang. C. Lan went to Nha Trang for the holiday last month, 2.filled/ cavity/ in/ dentist/ yesterday/ his/ a / tooth/ the/ . A. The dentist filled a cavity in his toothache yesterday. B. The dentist filled in his toothache a cavityyesterday. C. His toothache filled a cavity in the dentistyesterday. 3. was/ I / busy/ very/didn’t/ last night/ I / watch TV/ so/ . A. I didn’t watch TV so I was very busy last night. B. I didn’t was very busy so I watch TV last night. C. I was very busy so I didn’t watch TV last night IV.Complete the following sentences as directed: 1,5pts: Hoàn thành câu: 1.Hoa (not watch) …………………………………TV yesterday. 3.Lan was absent from school yesterday because she had the flu.  Why …............................................................................................? 4. She went to the cinema with her parents last weekend.  What ….........................................................................................?

A: WHO, WHAT, WHEN B: HOW, WHERE

Quangcuong347 giúp em với ạ Đốt cháy hoàn toàn 6,4 gam Cu bằng khí oxi. a) Tính thể tích khí oxi cần dùng (đktc) b) Tính số gam KClO3 cần dùng để điều chế lượng oxi trên . ( Cho Cu = 64, K = 39, Cl = 35,5, O = 16 )

II. Use the suggested words to make complete sentences, using the passive. 1. This car / make / Japan / ten years ago. _______________________________________________ 2. The rice / separate / the husk . _____________________________________________ 3. The next meeting / will / hold / Chicago / next month. _______________________________________________ 4. This room / not / use / for years. _______________________________________________ 5. The answers / must / write / the blackboard. _______________________________________________ 6. Kieu Story / write / Nguyen Du. _______________________________________________ 7. Our teeth / should / clean / everyday. _______________________________________________ 8. Three languages / speak / Malaysia / nowadays. _______________________________________________ 9. Rice / eat / by Vietnamese people / everyday. _________________________________________________ 10. This building / build / by French people / many years ago. __________________________________________________

vai trò của không khí trong hơi nước quan trọng như thế nào?

Tìm thương C của phép chia A = x^{3}+2x^{2}-5x-6 A=x 3 +2x 2 −5x−6 cho B =x^{2}+x-6 B=x 2 +x−6 .