e cần gấp ppppppppppppppppppppppppppp

Câu 3: ( 1,0 điểm) Cho tam giác ABC vuông tại A có đường cao AH, đường phân giác trong của góc A là AD với DB = 1, DC = 3. Tính tỉ số hb/bc.(mik cần gấp)

a) 3√5; b) 1,2√5; c) ab4√a với a ≥ 0; d) -2ab2√5a với a ≥ 0.

Nêu cảm xúc , suy nghĩ của em về tây nguyên,về đất nước việt nam sau khi đọc bài tây nguyên hùng vĩ . quyển bài tập thực hành phát triển năng lực tiếng việt tập 1 trang 6 ngắn nhất có thế nha

III. Complete the expressions below with these words. make slipped changed don’t on take 50. I’ve ............................... my mind. 51. I’ve got a lot ............................... my mind. 52. It’ll ............................... your mind off it. 53. I can’t ............................... up my mind. 54. I ............................... really mind. 55. It completely ............................... my mind. Now use the whole expressions to complete these sentences. 56. I’m sorry I’ve been so quiet recently. ..................................................... at the moment. 57. I don’t know whether to give her flowers or chocolates ..................................................... 58. I was going to go to university but ..................................................... I’m going to get a job instead. 59. What do you fancy - fish or pasta? - Either, really. You choose. ..................................................... 60. Did you post my letter? - Oh no, sorry. ..................................................... 61. I can see you’re really worried about this new job. Why don’t you go away for the weekend? ..................................................... for a couple of days.

Rút gọn biểu thức A = ($\frac{\sqrt[]{x}}{\sqrt[]{x}+3}$ - 1 ): ( $\frac{1}{x+\sqrt[]{x}-6}$ + $\frac{\sqrt[]{x}+3}{\sqrt[]{x}-2}$ - $\frac{\sqrt[]{x}-2}{\sqrt[]{x}+3}$ )

Trên cùng 1 nửa mặt phẳng bờ chứa tia Ox, vẽ hai tia Ot và Oy sao cho góc xOt = 40°; xOy = 120° a) tính góc tOy b)vẽ tia On là tia phân giác của góc xOy. Gọi Ox' là tia đối của Ox. Chứng minh tia Oy là tia phân giác của góc x'On

1. _______ one stage of child development has been left out, or not sufficiently experienced, the child may have to go back and capture the experience of it. A. When B. Where C. Which D. That 2. It is often tempting to hurry the child beyond his natural Seaming rate, _______ can set up dangerous feelings of failure and states of anxiety in the child. A. when B. where C. which D. that 3. The roads were crowded with refugees, many of _______ were wound. A. that B. whom C. when D. who 4. Hot desert conditions are rising in the west, _______ currently lost of crops are being grown. A. when B. where C. which D. that 5. My older brother living in the only ancient house _______ yesterday is traveling to Japan next month. A. is painted B. to be painted C. painting D. paints 6. He expected me to pay 80,000VND for 10 eggs, four of _______ were broken. A. that B. them C. which D. who 7. _______ as the number one beverage consumed worldwide, tea take the lead over coffee in both popularity and production with more than 5 million metric tons of tea produced annually. A. Ranked B. Ranking C. To rank D. That rank 8. The lorry crashed into a bus-load of schoolchildren, luckily none of _______ was injured. A. to whom B. whom C. that D. who 9. Tea is made from the leaves of an evergreen plant, Camellia sinensis, _______ grows tall and lush in tropical regions. A. that B. which C. what D. when 10. After being harvested, tea leaves are laid out on long drying racks _______ withering racks, for 18 to 20 hours. A. calling B. which call C. called D.to call

8. I don’t know for sure, Tony ______ lend you the money you need t. A. must B. need C. ought D. might

Giúp mik với mik cần gấp lm ;-; Cho tam giác ABC dưới đây. Số đo của góc 𝐵 là 600, độ dài AB = 2 cm, BC = 5 cm và BA = BD.H là trung điểm của BD. a) Chứng minh rằng: tam giác ABD đều. b) Chứng minh rằng: AH vuông góc với BD. c) Xác định độ dài AC. d) Phát biểu tam giác ABC có vuông góc tại A hay không. Giải thích cho câu trả lời . image