(x+2)^2-(x-2)^2 giúp mik với hứa sẽ đánh giá 5 sao

giúp em với mn ơi đăg lần 2 ko ai giúp vậy

Calli: Pão oi xjn đừng cuốn iemk đy :) NL: Chỗ toi hnay có pão mn ạ ._. Sohai :))

The boy is bad , he is reading the book => the boy.... Giúp em với ạ

Giúp mik với : 22- Alice said to me "I will see you tomorrow" _________________________________________________ 23- The worker said "we never work on Saturday " _________________________________________________ 24- The teacher said to his pupils " I want you to finish my test on time " __________________________________________________________ 25- The Brown said " We will spend our holidays in Da Lat next week" _________________________________________________________ 26- He said to me "I can't do this test " _________________________________________________________ 27- They said to him "we are learning E now " _______________________________________________________________

Exercise 5: Choose the best option to fill in the blank. 1. There used to be fewer people and .................. on the roads. A. roofs B. helmets C. helicopters D. vehicles 2. Do you know the .................. in the UK is to keep to the left? A. traffic light B. traffic rule C. traffic jam D. speed limit 3. It is dangerous to ride a motorbike without a .................. A. helmet B. triangle C. tricycle D. circle 4. In Hanoi, during rush hour, some road users ride their motorbikes on the .................. A. driving licence B. lane C. pavement D. seat belt 5. Traffic is terrible during the .................. when everyone is in a hurry to get to work or come back home. A. traffic light B. road sign C. traffic rule D. rush hour 6. The ................ for motorcycles is 40 km/h in towns and 60 km/h outside urban areas. A. speed limit B. driving licence C. traffic rule D. traffic light 7. You must .................. the traffic rules in order to avoid accidents. A. park B. obey C. reverse D. warn 8. It takes us more than three hours to drive across those .................. roads. A. wide B. safely C. right-handed D. bumpy 9. You need a driving licence to .................. A. drive a car B. ride a bike C. get on the bus D. get off the train 10. The large supermarkets in Vietnam often let you .................. free. A. park B. obey C. warn D. find 11. Some vehicles beep when they .................. to warn those behind. A. ride B. reverse C. drive D. sail 12. After school, children queue up and wait for the bus .................. on the pavement in front of the school. A. safe B. bumpy C. safety D. safely

Bài 8: Một xe đạp đi nửa quãng đường đầu với vận tốc 60km/h, nửa đoạn đường sau với vận tốc 40km/h. Xác định tốc độ trung bình trên cả quãng đường?

Calli : Ai cho vô nhóm từ nay tôi sẽ cày!

y=-4sin2x-3 hãy tìm giá trị lớn nhất,giá trị nhỏ nhất và tập xác định

Soạn bài từ ghép trang 13-17. Không mạng. Không copy