D= 3x (x-2y) -7/6 y (y-6x) tại x=3 , y=6

Giải giúp em câu này với ạ em cảm ơn mọi người nhiều

mọi người giúp em với!!! mọi người giải chi tiết câu 1 2 hộ em với ạ!!!

Task 4. Read the following passage and choose the best answer A, B, C or D. (1.25 points) (Em hãy đọc đoạn văn sau v chọn phương n trả lời đúng nhất.) Mrs. Brown's grandfather lives with her and her husband. Every morning, her grandfather goes for a walk in the park and comes home at half past eleven for lunch. But one morning, a police car stopped outside Mrs. Brown's house at eleven o'clock. Two policemen helped her grandfather to get out of the car. One of them said to Mrs. Brown “This old gentleman lost his way in the park and telephoned us for help, so we sent a car to bring him home.” Mrs. Brown was very surprised, but she thanked the policemen and they left. “But Grandfather,” she then said, “You go to that park every day. How did you lose your way home?” The old man smiled, closed one eye and said “I didn't quite lose my way. I was just tired and I didn't want to walk home!” Câu 21: What is the best title of the passage? A. The two policemen C. An old man B. An intelligent old man D. A walk in the park Câu 22: What happened to the old man one morning? A. He was tired so he didn’t want to walk home. B. He lost his way home. C. He stayed in the park. D. He came home for lunch. Câu 23: How did Mrs. Brown feel after talking to the two policemen? A. Very annoyed B. Very surprised C. Very upset Câu 24: What did the two policemen do? A. They took the old man home. B. They received a phone call from the old man. C. They helped the old man to get out of the car. D. All are correct. Câu 25: Which of the following statements is NOT true? A. The old man didn't quite lose his way. B. The old man didn't want to go home on foot. C. The old man lives with his granddaughter. D. The old man went home by taxi.

D= 3x (x-2y) -7/6 y (y-6x) tại x=3 , y=6

giải bài tập tiếng anh ( đang cần câu trl gấp )

một mặt bàn hình tròn có bán kính 0,5 m thì diện tích của nó là

We can understand the (1)... of the earth by considering the pressures beneath the earth's surface. Pressure in water is familiar enough a dam must be thicker at the bottom (2)... at the top in order to withstand the greater (3) ... a submatino can descend go dowonly a few hundred feet under the (4) of the sel. Below that its hull will collapse These forces are due to the weight of the overlying liquid, This in turn is a (5)... of the earth's gravitational pull With increasing distance below the surface of the earth pressures quickly (6)... enormous. No material can (7). These pressures without flowing in response Thus thens that one part of the earth cut project outward very (8)... father thunder Stounding regions. The rock beneath the bump would the flow out to the sides until the pressures (9)., equulized. Thus (10)... is what gives the earth is spherical shape. keeps all puts of its surface distance from the center

Read and write the animal names 1,It is aways hungry and it has a litter beard.It sounds like "boat' 2It is green and it jumps very well .It sounds like "dog" 3.It eats grass.It sounds like "now" 4.It lives in the sea .I am frightened of it ! It sounds like "park' 5.It has no legs and makes noise like "sssss".It sounds like "cake" 6.It is really big and it swim in the sea .It sounds like 'tail" 7.It flies at night .It sounds like "Pat" Mỏi cả tay làm nhanh giúp mik nha ,(Rãnh zô bun dưa lê với mik)

Câu 1: Cho a+b+c=2p. CMR: a) a^2-b^2-c^2+2bc=4.(p-b).(p-c) b) p^2+(p-a)^2+(p-b)^2+(p-c)^2= a^2+b^2+c^2