d) $\frac{x+7}{-20}$ = $\frac{-5}{x+7}$ (x khác 7) e)$\frac{x}{-8}$= $\frac{2}{-x^3}$(x khac 0) f) $\frac{x}{8}$ = $\frac{x}{x^3}$ (x khac 0)

Giúp em với ạ Cách đổi m/s và phút/giờ Km/h và trân thành cảm ơn ạ

Thế nào là hình chiếu của một vật thể?

5. Viết lại câu dùng TOO..TO... D The weather is so bad that we can't go out.-> The weather is too... 2) The film was so boring that we couldn't go on seeing it.-> The film was too..... 3) He was so old that he couldn't run fast.>) He was too..... 4) He spoke so fast that we couldn't understand him.> Hle spoke too.... 5) The fair was so noisy that we couldn't hear each other.> The fair was too... 6) You speak so fast that I can't catch up with your words.> You speak too.. 7) It is so early that we can't go out.> It is too..... 8) The water is so hot that I can't drink it.=> The water is too...... 9) The restaurant is so expensive that we can't eat in that restaurant.-> The restaurant is too..... 10) He studied so badly that he couldn't pass the exam.=> He studied too...... 6. Combine each of the following pairs of sentences into one sentence using too/enough with infinitive I You are very young. You can't have a front-door key. 2 It is very cold. We can't bathe. 3 Would you be very kind and answer this letter by return? 4 1 am rather old. I can't wear that kind of hat. 5 The ladder wasn't very long. It didn't reach the window. 6 He hadn't much money. He couldn't live on it. (Omit it.) 7 He was furious. He couldn't speak. 8 The fire isn't very hot. It won't boil a kettle. 9 Tom was very foolish. He told lies to the police. 10 You are quite thin. You could slip between the bars. 11 He is very ill. He can't eat anything. 12 Our new car is very wide. It won't get through those gates. 13 The floor wasn't strong. We couldn't dance on it. (Omit it.) 14 I was terrified. I couldn't move. 15 The bull isn't big. He couldn't harm you. 16 The coffee isn't strong. It won't keep us awake. 17 The river is deep. We can't wade it. (Omit it.) 18 He is lazy. He won't get up early. 19 He won't get up early so he never catches the fast train. 20 Would you be very good and forward my letters while I am away? 21 The ice is quite thick. We can walk on it. (Omit it.) 22 He was very drunk. He couldn't answer my question. 23 It is very cold. We can't have breakfast in the garden. 24 He was extremely rash. He set off up the mountain in a thick fog. 25 We aren't very high. We can't see the summit. 26 You aren't very old. You can't understand these things. 27 He was very snobbish. He wouldn't talk to any of us. 28 The package is very thick. I can't push it through the letterbox. (Omit it.) 29 She was very mean. She never gave to charity. 30 He is very impatient. He never listens to anyone. 31 I was very tired. I couldn't walk any further. 32 It's not very dark. We can't see the stars clearly. 33 It was very hot. You could fry an egg on the pavement. 34 The oranges were very bitter. We couldn't eat them. (Omit them.) 35 Would you be very kind and turn down the radio a little? 36 He is very selfish. He wouldn't put himself out for anyone. 37. It is very cold. We can't go out. 38. He is strong. He can carry it.

Giúp em với ạ em đang gấp lắm ạ hic hic

Trái đất quay quanh mặt trời theo quỹ đạo như một hình tròn, bán kính R= 1,5.$10^{8}$ km. Mặt trăng quay quanh trái đất theo một quỹ đạo như hình tròn, bán kính r= 3,8.$10^{5}$ km. a) Tính quãng đường trái đất vạch được trong thời gian mặt trăng quay đúng 1 vòng ( 27,25 ngày) b) Tính số vòng quay của mặt trăng quanh trái đất trong thời gian trái đất quay đúng 1 vòng ( 365,25 ngày).

5*(1 +cos(x))+cos(x^4) -sin(x)^4 = 2

cách làm cho người ta gầy đi,mặc gì vảo sẽ khiến bạn cảm thấy gầy đi,màu nha

Giúp em với mọi người ơi. Love you!

Từ câu trả lời của mọi người và từ những người suy nghĩ riêng, em hãy viết bài văn (khoảng 500 chữ) bàn luận về các phương pháp học tập hiệu quả hoặc vẽ sơ đồ, vẽ tranh để giới thiệu về phương pháp học tập tập tin đó.(Ko chép trên mạng và sách )