Cho tam giac ABC có trung điểm các cạnh AB,BC,CA lan lưot là M(-1;-1) N(1;9) P(9;1). Lập pt các đường trung trực của 3 cạnh.

Ba bạn Toán, Tuổi và Thơ có một số vở. Nếu lấy 40% số vở của Toán chia đều cho Tuổi và Thơ thì số vở của ba bạn bằng nhau. Nhưng nếu Toán bớt đi 5 quyển thì số vở của Toán bằng tổng số vở của Tuổi và Thơ. Hỏi mỗi bạn có bao nhiêu quyển vở?

1.The car is in quite good condition but you can try it _____before you make any decision to buy. 2. According _____what he says, he wasn’t even there when the crime was committed. 3. According to a recent survey, most people are on good terms _____their neighbours. 4. As he wanted to go to university, David decided to turn _____a new leaf and study harder. 5. _____arriving at the airport, I was very worried to find that no one had waited for me. 6. Environmental organisations have been set _____to inform people and gain their support. 7. I can't understand why you have to make such a fuss _____something so unimportant. 8. I’m afraid Mr. Logan isn’t in the office today, but I can put you _____to his secretary.  9. I've asked _____but nobody knows what time the concert will finish on Saturday. 10. On hearing the news of his mother's death, the boy broke _____and couldn't be consoled.

Làm giúp với ạ! Đúng và đầy đủ với ạ!

Give the verbs in brackets in simple continuous tense. 1. This time next year I (live) ........................... in London.

Cho ΔABC có AB=AC=5cm, BC=8cm. Kẻ AH ⊥ BC (H ∈ BC). Chứng minh:. a)HB=HC và góc BAH= góc CAH b)Tính AH c)Gọi D và E là chân đường vuông góc kẻ từ H đến AB và AC. Chứng minh ΔHDE cân Cho mình xin hình đầy đủ nha, mình cảm ơn nhiều

phần vận dụng ạ ghi rõ mở thân kết ạ

Giải hộ mình bài 2 3 vs ạ cảm ơn nha

diện tính bảng lớp em khoảng :A. 2 cm2 B .2 dm2 C .2 m2 D. 2 km2

I. Read the following text and choose the best answer for the questions below. Almost all our energy comes from oil, coal, and natural gas. We call them fossil fuels. The earth's fossil fuels are running out. What will happen when there is no oil, coal and gas on the earth?Scientists are trying to find and use other alternative sources of energy. We can use energy from the sun, the wind, and the water.Solar energy is unlimited. The sun supplies all the energy used to grow plants, to evaporate water for rain, and to maintain the temperature of the planet. All are necessary for human life. If we are able to collect solar energy, we will be sure to have this abundant source of power. 1. What are the other words or phrase for fossil fuels? A. oil B. natural gas C. oil, gas, natural gas D. coal 2. Natural sources of energy are energy from ________. A. wind B. the sun, wind, water C. water D. the sun 3. From which do plants on the earth get energy? 1 điểm A. the sun B. the Mars C. the moon D. stars 4. We are asking the question, "What will happen when there is no oil, coal, and gas on the earth?" because ________. A. we are now depending so much on oil, coal, and natural gas B. other sources of energy can come from the sun, wind, and water C. we are looking forward to seeing great changes D. we are looking for other alternative sources of energy 5. The word "abundant" in the passage is closest in meaning with ________. A. limited B. natural C. plentiful D. necessary II. Choose true or false Linh and her friends went camping for four days in Da Lat. They left their house at 6 o'clock. Ha brought a tent and some foods. Tom brought a ball to play volleyball. Ly brought her camera to take some photos. Nga and Mai brought some drinks. They took some orange juice. They didn't take iced tea because it was cold. They also took some food. Their favorite foods are chicken, lettuces and tomatoes. Ha's mother helped them to arrange food and drink for their camping. They stayed in a small hotel. The hotel looked over a very beautiful garden with a lot of flowers and green trees. They enjoyed the fresh air there. Linh said her dream house was one surrounded by a flower fence. 6. Linh and her friends went for a camp for four days. A. True B. False 7. They went to Da Lat at 6 o'clock. A. False B. True 8. Nga brought a basket to play volleyball. A. False B. True 9. Nga and Mai didn't take iced tea because it was cool. A. False B. True 10. Ha's mother helped them to arrange food and drink. A. True B. False