giúp e vs ạ : tìm ảnh của đt (C): x^2+y^2-4x+6y=0 qua phép quay tâm o góc quay 180 độ

chứng minh a^3 - b^3 = ( a-b) ^3 +3ab(a-b) cho a-b = -3 a nhân b = 10 tính a^3 - b^3

cho biểu thức A= 4 n-3 a,Tìm điều kiện của n để A là phân số b,Tìm phân số abieets n=0;n=10;n=-2 Các bạn chú ý là A bằng 4phần n trừ 3 nha . Làm nhanh nha bài tập hè của mink sau này còn hỏi mink sẽ vote cho nha!!!!

Giúp mình với bạn ơi mình cảm ơn bạn trước

8. 'If you take my advice, Paul,' said Lynda, 'you should buy a personal computer.' (advised) --> Lynda _____ a personal computer. 9. Pauline hadn't expected to see so many people at the concert. (surprise) --> It came ____ to see so many people at the concert. 10. Golf is becoming increasingly popular in Britain. (popularity) --> The ____ in Britain.

Tính hợp lí(nếu có thể): a, A=35.73-135.27+35.27-73.153 b,B=96.7 mũ 2-37.7 mũ 2+15.7 mũ 2-49.174 c,C=2/7.(22/19-12/51)+2/7.(-3/19+ âm 2/7) d, D=1/2+5/6+11/12+19/20+29/30+41/42+55/56+71/72+89/90 CÁC BN GIÚP MK VS!!! MK ĐĂNG NHƯNG CHẢ AI TL J CẢ!!!MK CẦN GẤP LẮM R!!!

1. Shoes and sandals are .............. from recycled old car tires A. make B. made C. maked D. to make 2. It is fun ................. T.V. A. to watch B. watching C. watched D. watch 3. My school will be ...................... next year. A. building B. to build C. built D. builded 4. Would you mind .................. the windows? A. open B. to open C. opening D. opened 5. He ........... a new computer on his birthday by his mother A. gave B. has given C. given D. was given 6. Glass should be collected and sent to factories for ............ A. recycling B. reducing C. refilling D. reusing 7. I promise I .............. video games any time A. will play B. play C. won’t play D. to play 8. They were .............. to repair the table. A. tell B. told C. to tell D. telling

chỉ ra sự giao thoa và khác biệt giữa các phong cách ngôn ngữ

5. Christine complained formally when her course of study was cancelled. (made) --> Christine ____ when her course of study was cancelled. 6. 'I find all the advertisement on TV really irritating,' said John. (nerves) --> 'All the advertisements on TV really ____,' said John. 7. Mark regretted selling his old motorbike. (wished) --> Mark _____ his old motorbike.

V lít khí CO2 ở độc vào 100ml dd Ba(OH)2 1M thu được 9,85 g kết tủa . Tính V