1, 1) Thực hiện phép tính A = $\frac{-2.6^9 + 4^5.9^4}{6^8.20 + 3^8.2 mũ mười}$ + 0,(6) 2 Tìm ba phân số tối giản biết tổng của chúng bằng 3$\frac{3}{70}$ , tử của chúng tỉ lệ với 3; 4; 5 còn mẫu của chúng tỉ lệ với 5; 1; 2.

Joining two sentences, using the words in brackets. 1. We must conserve water. Otherwise we will face serious water shortages. (IF) ____________________________________________________________________ 2. The weather was awful. We didn’t enjoy our camping holiday. (BECAUSE OF) ____________________________________________________________________ 3. Plastic bags are non-biodegradable. They will remain in the environment for many years. (SINCE) ____________________________________________________________________ 4. Paul doesn’t think about the planet. He wastes so much water. (IF) ____________________________________________________________________ 5. Water pollution happens. Many aquatic animals such as fish can die. (LEAD) ____________________________________________________________________ 6. The climate is changing. The earth is getting warmer. (BECAUSE) ____________________________________________________________________ 7. We should stop cutting down so many trees. We endanger our oxygen supply. (UNLESS) ____________________________________________________________________ 8. People begin to recycle. They generate much less trash. (WHEN) ____________________________________________________________________ 9. We are damaging the ozone layer. The ozone layer is necessary for human existence. (EVEN THOUGH) ____________________________________________________________________ 10. Sue is suffering from skin cancer. She was exposed to radiation when she was young. (SO) ____________________________________________________________________

x³-y³+z³+3xyz/(x+y)^2+(y+z)^2+(z-x)^2 Rút gọn phân thức sau?

Giữa đám đất hình vuông chu vi là 60 m, người ta đào một cái giếng hình tròn. Miệng giếng có đường kính 1,4m. Xung quanh miệng giếng có xây một cái thành rộng 0,3m. Tính diện tích phần còn lại.

Match the questions to the answers. 1. What is the main reason for thermal pollution? 2. What effect does thermal pollution have on aquatic animals? 3. How to minimize the water pollution due to Chemicals? 4. What diseases are usually caused by air pollution? 5. Which gas is mainly responsible for global warming? 6. What are the effects of noise pollution? 7. Why are plastic bags a big environmental nuisance? 8. What are sources of radioactive pollution? a. They are non-biodegradable and create an environmental harzard. b. Nuclear wastes from nuclear power plants, mining and processing of nuclear material etc. c. Carbon dioxide. It contributes about 55% to global warming. d. It affects their growth and may kill off them. e. Hot water released by power plants and industries. f. Sleep disturbance, high blood pressure, emotional problems and annoyance. g. Rickets, throat cancer, lung cancer and breathing problem. h. Treat wastewater before discharging into a flowing body of water.

Ai làm giúp mình với ạ Cảm ơn nhiều ạ

Điểm tương đồng và khác nhau giữa người phụ nữ trong 2 tác phẩm Những ngôi sao xa xôi - Lê Minh Khuê và Chuyện người con gái Nam Xương - Nguyễn Dữ là gì

.1. Mrs. Chi is a quick typist. (Write this sentence again not change the meaning) Mrs. Chi …………………………………………………………………………….. 2. Don't worry! Your cold will last for a few days and then......................... (appear) (Use the correct form of the word). 3. You shouldn’t listen to that loud music. (Write this sentence again not change the meaning) You’d …………………………………………………………………………………. 4_____________ can be fun but accidents can happen. (swim) (Use the correct form of the word). 5. It takes me about five minutes to go to school by bike. (Rewrite the sentence with “spend”) …………………………………………………………………………………………… 6 . Collecting comics is easy. (Rewrite the sentence with the same meaning.) -> It’s ……………………………………………………………………............................. 7. Julia has been working for this company for six years. -> Julia started.................................................................................................................... 8. His idea is different from mine. → His idea is not................................................................................................................. 9. These Dong Ho paintings are more expensive than those modern paintings. → Those modern paintings are not...................................................................................... 10. Chefs use these machines to mix the ingredients. → These machines .............................................................................................................

Để làm một chiếc hộp không nắp người ta cắt đi bốn hình vuông bằng nhau ở 4 góc của miếng bìa hình chữ nhật kích thước 12cm x 10cm. Hỏi cạnh hình vuông đó là bao nhiêu, biết rằng tổng diện tích phần cắt đi bang 1/3 diện tích đáy hộp?

trả lời giúp mình từ 1-7 nha mình cảmmon