Chúc bạn học tốt!!^^
Nhớ vote sao và cảm ơn nha ><
Bài 2. Tìm các giá trị của m, a và b để các cặp phương trình sau đây tương đương: a. mx2 – (m + 1)x + 1 = 0 và (x – 1)(2x – 1) = 0 b. (x – 3)(ax + 2) = 0 và (2x + b)(x + 1) = 0
Có 3 viên bi nhìn bề ngoài giống hệt nhau trong đó có 1 viên bằng chì, 2 viên bằng sắt hãy chứng minh rằng chỉ cần dùng cân Rô-béc-van cân một lần duy nhất có thể tìm ra viên bi bằng chì
Hòa tan hoàn toàn hỗn hợp gồm 3,6 gam Mg và 6,75 gam Al bằng dung dịch H2SO4 đặc nóng thì thu được hỗn hợp 2 muối, V lít khí khí SO2 (đktc) và nước. a. Viết phương trình và tìm V b. Tính khối lượng muối thu được sau phản ứng
Gấppp..Bạn nào ơi làm giúp mình với. Tí phải nộp r mà mình kh làm đk 🤒
1.I/glad/able/ I/ were / am/to/ come/that/you. 2. Everybody / important / feel/it's/ should / that/ comfortable. 3. She/ surprised/ am/ hasn't/ I/ that/ phoned 4. We/ that/ never/ he # giúp e vs ah.Cảm ơn mn rất nhiều
4,9 < X < 5,1 Tìm 3 giá trị của X Thank you
(((1-x\sqrt(x)))/(1-\sqrt(x))+\sqrt(x))*(((1+x\sqrt(x)))/(1+\sqrt(x))-\sqrt(x))
Exercise 5. Write the second sentence so that it has the same meaning as the first one. Use the word in brackets. 1. I’m leaving now because I don’t want to miss the train. (so) I’m____________________________________________________________________ 2. The last time I saw my uncle was two years ago. (for) I haven’t_______________________________________________________________ 3. Let me reach my office and then I will talk to him. (when) I_____________________________________________________________________ 4. Why don’t we donate our old books, toys and clothes to charity? (suggests) Mom_________________________________________________________________ 5. Jane stayed behind after the class in order to talk to the teacher. (because) Jane__________________________________________________________________ 6. Where do you live? (address) What _______________________________________________________________? 7. How old is she? (age) What _______________________________________________________________? 8. What time will it start? (start) When _______________________________________________________________? 9. Mr. Brown is not free this afternoon. (be) Mr. Brown ____________________________________________________________. 10.What does his sister do? (job) What ________________________________________________________________? Exercise 6. Read the passage then answer the questions below: Her name is Linda. She works in a large company in Ho Chi Minh City. She is a secretary. She answers the telephone and takes messages. She also uses a fax machine and a computer. She has to speak English with her boss. She starts work at 8:00. She usually rides her motorbike to work. She has lunch at 12:00. She finishes work at 5:30 pm. She goes home and helps her mother prepare dinner. After dinner she often watches television for a while and reads books. She usually goes to bed at 11:00pm. Questions: 1.Where does Linda work? ______________________________________________________________ 2. What does she do? ______________________________________________________________ 3. What language does she speak with her boss? ______________________________________________________________ 4. Can she use a computer? ______________________________________________________________ 5. How does she go to work? ______________________________________________________________ …………THE END………….
Giúp mk vs! 11.I spend my spare time gardening. A. mostB. the most ofC. most ofD. most of the 12.Your body uses calcium to build healthy bones and teeth, them strong as you age. A. continueB. keepC. remainD. care 13.Food in Northern Vietnam is not as as that in Central and Southern Viet Nam, as black pepper is often used rather than chilies. A. spicyB. excitingC. strongD. flavour 14.Pumpkin soup is a good source of minerals and vitamins, especially vitamin A. A. fibersB. fatsC. sugarsD. solids 15.There’s use in complaining. They probably won’t do anything about it. A. a fewB. a littleC. noD. some 16.If you eat too quickly, you may not attention to whether your hunger is satisfied. A. keepB. showC. payD. take 17.Another feature in northern cuisine is in winter all family members gather around a big hotpot there is a combination of seasoned broth, vegetables and meats. A. whatB. whereC. whichD. in which 18.You chicken. You cook it in an oven or over a fire without liquid. A. fryB. roastC. steamD. boil 19. cups of coffee have you taken? A. How manyB. How muchC. HowD. How far 20.Common eating habits that can lead to are: eating too fast, eating when not hungry, eating while standing up, and skipping meals. A. put on weightB. be heavyC. gain weightD. weight gain
Hòa tan 26,7 gam hỗn hợp NaI và NaCl vào nước được dung dịch A. Cho Br2 vừa đủ vào dd A được muối X có khối lượng nhỏ hơn khối lượng của hỗn hợp muối ban đầu là 4,7 gam. Khối lượng naCl trong hỗn hợp bằng:
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