tại sao chúng ta phải tiêm vắc xin phòng chống covid 19

Làm giúp mình vs giải thích nx nhé

Tìm x, biết::::::::::: ngắn gọn giúp mik

F(X)=X^4-2X^3+3X^2-X+5 G(X)=-X^4+2X^3-2X^2+X-9 a. tính F(X)-G(X) và K(X)=F(X)-H(X)

Giúp mình với mình thật sự cần gấp ạ 😢😢

VẼ CHO MÌNH 1 LOGO NAME : Kông Minh 06 ;Minh Khoi vẽ đẹp nha mình cho 5 sao nha

Choose the correct answer.( Xem cái link video ở dưới phần hỏi chi tiết để mà trả lời câu hỏi nha) 1.What do most people think of when they think of Halloween? ⬜Friendly activities ⬜Only trick or treat ⬜“La Castanyera” and chestnuts 2.In the medieval tradition of souling, what would the needy do in return for the soul cakes? ⬜They would play with the ghost. ⬜They would bake pastries. ⬜They would pray for people’s dead relatives. 3.What was the previous night called? ⬜All Souls’ Day ⬜All Saints Day or Al Hallows ⬜All Hallows’ Eve 4.What day was Samhain celebrated on? ⬜30th October ⬜31st October ⬜1st November 5.What did the Celts believe that happened on the night before Samhain? ⬜The dead returned as ghosts. ⬜There were witches in the air. ⬜They sang in the Celtic festival. 6.How far back can the origins of Halloween be traced? ⬜The Medieval Britain ⬜The 8th century ⬜Some 2000 years ago 7.When did the Christian Church turn Samhain into All Saints' Day? ⬜The Medieval Britain ⬜The 8th century ⬜Some 2000 years ago 8.What would people do to prevent spirits from harming them? ⬜They would sing beautiful songs. ⬜They would leave wine on the window. ⬜They would leave food and wine on the doorsteps. 9.Why did they wear masks before they left the house? ⬜To play trick or treat ⬜To be mistaken for a fellow ghost ⬜ To play with a fellow ghost 10.When did Halloween take on its current form? ⬜The 1950s ⬜ In the 17th century ⬜In 2000 11.In the tradition of guising, what would young people do? ⬜They sing, recite poetry or tell jokes. ⬜They dress up in fancy swimsuits. ⬜They cook all the food. 12. What is the estimated cost of celebrating Halloween each year? ⬜2 billion ⬜2.5 billion ⬜6 billion 13. Who brought these old traditions to America and when? ⬜English and Scottish immigrants in the 19th century ⬜Irish and Scottish immigrants in the 19th century ⬜Columbus and Scottish immigrants in the 16th century

Các bạn giải giúp mik với ạ. Lưu ý: cấm spam+copy. Từ h acc này sẽ là acc phụ của mik @alicethao2k9. Mik đã xin bạn chủ acc cho mik quyền sử dụng acc này rồi.

Read the following passage then choose the best answer to fill in the blank: In the United States of America, the national language is (1)....... English. Four hundred years ago, some English people came to North America to live and they brought (2)....... language to this country. Now in the USA, people speak (3)...........English . Most of the words are the (4)............ in American and British English, but the American say some English words not as people (5)........... in England. Canada is (6).......... to the North of the United States of America. It is the larger (7)......... the United States. In Canada, many people (8)............ English because they also came from England many years (9)......... But in some parts of Canada, people speak (10)............ because they came from France. 1. A. also. B. like. C. as. D. not. 2. A. French. B. English. C. Chinese. D. Canadian. 3. A. British. B. American. C. Russian. D. Chinese. 4. A. various. B. similar. C. same. D. like. 5. A. do. B. say. C. talk. D. speak. 6. A. lies. B. situated. C. at. D. in. 7. A. than. B. as. C. more. D. less. 8. A. say. B. tell. C. talk. D speak. 9. A. ago. B. later. C. there. D. here. 10. A. France. B.French. C. Russian. D. Italian.

cho tam giác ABC vuông tại A, đường cao AH. gọi E,F lần lượt là hình chiếu H trên AB,AC.Chứng minh: a, FB trên FC =AB3 trên AC3 b,BC2= 3AH2 + BE2 +CF2 c,BE. căn CH +CF. căn BH = AH. căn BC