cho tam giác ABC vuông tại A, đường phân giác AD. Biết AB=3,AC=4. Tính DB, DC, AD

Helppppppppppppppppppppppppppppppppp làm vào tờ này nhé

Bài 1 : Cho 5,4 g Al pư với dd 200g dd H2SO4 19,6%.Tính nồng độ phần trăm dd các chất sau pư Mọi người giúp em với em đang cần gấp

Giúp e với ạ :( Lm có tâm vào ạ

vẽ khủng long, đậu mầm hoặc chibi NL: mn ơi, có bạn nào biết app nào học tiếng anh tốt nhất khum ạ, cho người mới bắt đầu từ số 0

Ai giúp mình với 🥺 Hứa sẽ ❤️ và votes

Một vật dao động điều hòa theo phương trình x=6cos[(5 pi t) - (pi/4)] cm. Tính từ lúc bắt đầu khảo sát dao động, lần thứ hai vật có vận tốc v = - 15pi (cm/s) vào thời điểm...?

tính nhanh B = -1/3 + 1/3 mũ 2 - 1/3 mũ 3 + .... + 1/3 mũ 50 - 1/3 mũ 51

. Choose the word that does not have the same pronunciation of the underlined part as that in the rest 1. A. carriage B. category C. capture D. career 2. A. access B. attend C. experience D. effective II. Choose the word that does not have the same stressed syllable as that of the rest 3. A. slavery B. candidate C. humorous D. deposit 4. A. conservation B. territory C. innovation D. limitation III. Choose the word/phrase (A, B, C or D) that best fits the space in each sentence (2.5 pts) 5. A party _________________ by the coach on the weekend. A. will throw B. will thrown C. will be throw D. will be thrown 6. Do you remember the place _________________ we caught the train? A. which B. that C. where D. when 7. Organized crime, drug trafficking and money _________________ are not new in themselves. A. flushing B. watering C. washing D. laundering 8. Vandals smashed windows and overturned cars in the _________________ shopping district. A. tender B. manual C. relaxed D. downtown 9. In AD 79, the city of Pompei was buried _________________ a layer of ash seven metres deep. A. after B. under C. through D. from 10. Work on the production line is monotonous and lacks _________________. A. index B. team building C. variety D. attraction 11. Some of these mouse click shortcuts are worth _________________. A. to learn B. learning C. learn D. learnt 12. The player wondered _________________ goals they would score that week. A. how long B. how far C. how many D. how much 13. - Linh: “I didn’t pass my driving test.” - David: “_________________” A. Congratulations. B. Oh, that’s nice. C. Better luck next time. D. So poor. 14. - Ken: “_________________” - Marcos: “She’s cleaning things and doing chores.” A. What is your mother doing now? B. Is your mother cleaning things? C. When is your mother cleaning things? D. Do you like doing chores?

VIII. choose the correct option for each blank to complete the passage In the modern world, people depend on energy to power their everyday lives. A wide range of power-run devices and modern conveniences(1)......., and although it may seem that we will not be in danger of living without those conveniences, the fact is that many supplies of energy