7) ( 6x + 2)(x – 2) = 2x(3x – 5)

Tình hình là quên các kiến thức rồi

Một mảnh vườn hình chữ nhật có chiều dài 40m, chiều rộng bằng 2/5 chiều dài. Tính chu vi và diện tích của mảnh đất đó. a. Chu vi của mảnh vườn hình chữ nhật là: .........m b. Diện tích của mảnh vườn hình chữ nhật là: ......... (m²)

Một tam giác là vuông nếu độ dài 3 cạnh của nó là (đơn vị cm)

Giúp mik nha mik cần gấp hứa vote+ cảm ơn đầy đủ

Hình ảnh trên làm em suy nghĩ gì về môi trường, về chiến tranh và thái độ của em ntn về những vấn đề trên?

tổng số tuổi hiện nay của bà của huệ ,hải là 80 tuổi . cách đay 2 năm , số tuổi cua bà hơn tổng số tuổi của huệ và hải là 54 tuổi . huề nhiều hơn hải 6 tuổi . hỏi hiện nay mỗi người bao nhiêu tuổi

A. Choose the best answer for each numbered blank.(2pts) Water pollution is the contamination of bodies water such as (1)_______________, rivers, oceans, and groundwater (the water beneath the Earth's surface). It is one of the most serious types of pollution. Water pollution can have many different causes. Factories dump industrial waste (2) ________________ lakes and rivers. Sewage from households is another cause. Farms using (3) _________________ to kill insects and herbicides to kill weeds can also lead to water pollution. These factors cause ‘point source’ pollution while (4) ______________ from storm water and the atmosphere result in ‘non-point source' pollution. (1) A. streets B. lakes C. buildings (2) A. to B. onto C. into (3) A. pesticides B. herbicides C. waste (4) A. pollutants B. polltion C. polluted B. Read the text , then answer the questions.(3pts) The Land of Oz Kim is from Korea. She and her parents are leaving for Australia on vacation. Their flight from Seoul to Sydney is boarding now. Australia is enormous. It’s a country and a continent. Australians speak English, but they have their own slang. Australians are called Aussies, their country is Oz, and they have forty different kinds of roos (kangaroos). The word kangaroo is native Australian. There are also lots of things to do Australia. In Sydney, there is the famous Opera House, and there are beautiful beaches. In the northeast, there is the Great Barrier Reef. Visitors can snorkel. There is also Ayers Rock in the center of the country. It’s a very big rock, 345 meters tall and 3 kilometers long. Kim is very excited about her trip to all these wonderful places. Choose the best answer for each question: 5. Where are Kim and her parents going on vacation ? A. They are going to Australia on vacation. B. They are going to Korea on vacation. C. They are going to England onn vaccation. 6. What can visitors do at the Great Barrier Reef ? A. They can swim. B. They can snorkel. C. They can walk. 7. How does Kim feel about her trip ? A. She feels boring. B. She feels tired. C. She feels excited. A 8. How big is Ayers Rock in the center of the country ? A. 345 meters long and 3 kilometers tall. B. 345 meters tall and 3 kilometers long. C. 354 meters tall and 3 kilometers long. 9. Is Australia a country and a continent ? A. Yes, it is B. No, it isn’t C. Yes, they are 10. What language do the Australian speak ? A. Australian B. English C. French II.WRITING: Choose the sentence that has the same meaning as the first. (5pts) 11. Herbicides lead to point sourse pollution. A. Point sourse pollution happens due to herbicides. B. Point sourse pollution causes herbicides. C. Herbicides pollute the pointed sourse. 12. Those ships have spilled oil in oceans and rivers, so the water is polluted. A. Oceans and rivers are polluted because of oil. B. Oil from those ships results in water pollution in oceans and rivers. C. Ships in oceans and rivers pollute the water. 13. The trees are dead due to the acid rain. A. If the rain had acid, it wouldn’t make the trees die. B. The acid rain occurs because of the trees. C. The acid rain makes the trees die. 14. The cattle station in Australia is larger than that in Belgium. A. The cattle station in Belgium is the largest in the world. B. The cattle station in Belgium is not as large as that in Australia. C. The cattle station in Australia is the largest in the world. 15. They offer the flights to Canada daily. A. The flights are offered by Canadians every day. B. The flights to Canada are offered. C. The flights to Canada serve every day. THE END.

Tental đi qua hai điểm A(1; -1) và B(4;0) giải làm sao ạ

Mangan (IV) oxit, khí oxi, sắt (II) sunfua, nước, oxit sắt từ hay sắt (II, III) oxit, canxi oxit, điphotpho pentaoxit, lưu huỳnh trioxit. Công thức hóa học tương ứng với từng chất oxit (nếu có) mà đề đã cho là A. MnO, H 2 O, Fe 3 O 4 , CaO, P 2 O 5, SO 3 ; B. MnO 2 , O 2 , H 2 O, Fe 2 O 3 , CaO, P 2 O 5, SO 2 ; C. MnO 2 , FeS, H 2 O, Fe 3 O 4 , CaO, P 2 O 3, SO 3 ; D. MnO 2 , H 2 O, Fe 3 O 4 , CaO, P 2 O 5, SO 3 .