Lúc đầu một ki-lô-gam thịt bò người ta bán với giá là 200 000 đồng.Nay người ta tăng giá lên 10% mỗi ki-lô-gam so với giá bán ban đầu.Hỏi nếu em mua muốn mua 2,5 ki-lô-gam thịt bò thì em phải trả bao nhiêu tiền?

Bài 1: Điền vào chỗ trống (…..) để được khẳng định đúng. a/ Cho trước một điểm M và một đường thẳng a, có ………………….đường thẳng a’ đi qua M và vuông góc với a. b/ Đường thẳng vuông góc với đoạn thẳng tại trung điểm của nó gọi là ………………… c/ Nếu một đường thẳng vuông góc với một trong hai đường thẳng song song thì ………. d/ Hai đường thẳng phân biệt cùng song song với một đường thẳng thứ ba thì ………….. Bài 2: Một ô tô đi từ A đến B với vận tốc 50 km/h hết 6 giờ. Hỏi nếu ô tô đi với vận tốc 60km/h thì mất bao lâu? Làm đc hết nhé mình cho 5* luôn

M.n giúp em ạ Bài2 Tính bằng cách thuận tiện nhất: A)18,71-9,24+16,29-6,76: B)25,75+24,36-35,75: C)2,5×12,5×0,8×4: D)0,25×068×40: E)5,67×0,25×0,4: G)0,125×0,6×8: Bài3 Tính bằng cách thuận tiện nhất: A)5,6×4+5,6×3+5,6×2+5,6: B)7,89×54-7,89×52-7,89: C)1,47×3,6+1,47×6,4: D)5,25×18-5,25×2-5,25×6: E)25,8×1,02-25,8×1,01: G)2,5×9,5×4+19,5×10:

1/ Jason told me that he _______ his best in the exam the _______ day. * 5 điểm A. had done/following B. will do/previous C. would do/following D. was doing/previous 2. The teacher asked Minh _______ in English. * 5 điểm A. what does this word mean B. what that word means C. what did this word mean D. what that word meant 3. The student said that the English test_______ the most difficult. * 5 điểm A. is B. was C. will be D. has been 4. John asked me _______ that film the night before. * 5 điểm A. that I saw B. had I seen C. if I had seen D. if had I seen 5. The guest told the host that _______. * 5 điểm A. I must go now B. he must go now C. he had to go now D. he had to go then 6. “What are you doing now?” the teacher asked Tom. * 5 điểm A. The teacher asked Tom what he was doing now. B. The teacher asked Tom what was he doing then. C. The teacher asked Tom what he was doing then. D. The teacher asked Tom what was he doing now. 7. “Do you know Long’s address?” he asked me. * 5 điểm A. He asked me for Long’s address. B. He asked me if someone knew Long’s address. C. He asked me if I know Long’s address. D. He asked me if I knew Long’s address. 8. “Please stay home when the pandemic is everywhere,” the teacher said to us. * 5 điểm A. The teacher said us to stay home when the pandemic was everywhere. B. The teacher asked us stay home when the pandemic was everywhere. C. The teacher asked us to stay home when the pandemic was everywhere. D. The teacher asked us when the pandemic was everywhere and we had to stay home. 9. “I’ll tell you about this tomorrow, Mary,” said Tom. * 5 điểm A. Tom said to Mary that he will tell her about that the next day. B. Tom told Mary that I would tell you about that the next day. C. Tom told Mary that he would tell her about that the next day. D. Tom said Mary that he would tell her about that the next day. 10. “Please don’t post false information on the Internet,” Kerry said to Susan. * 5 điểm A. Kerry asked Susan to post false information on the Internet. B. Kerry asked Susan not to post false information on the Internet. C. Kerry asked Susan didn’t post false information on the Internet. D. Kerry asked Susan if she didn’t post false information on the Internet. 11. “We should support medical staff and soldiers in the fight against the pandemic,” he said. * A. He told we should support medical staff and soldiers in the fight against the pandemic. B. He said we should support medical staff and soldiers in the fight against the pandemic. C. He said we had to support medical staff and soldiers in the fight against the pandemic. D. He said me we should support medical staff and soldiers in the fight against the pandemic. 12. He said: “It is our responsibility to follow the instructions of the government.” * A. He said that it was our responsibility to follow the instructions of the government. B. He said that it is our responsibility to follow the instructions of the government. C. He said that it was our responsibility and followed the instructions of the government. D. He told it was our responsibility to follow the instructions of the government. 13. “My daughter wrote a letter to the soldiers yesterday,” she said. * A. She said her daughter had written a letter to the soldiers the day before. B. She told her daughter to write a letter to the soldiers the day before. C. She told her daughter wrote a letter to the soldiers the day before. D. She told me her daughter had written a letter to the soldiers yesterday. 14. “Wear a face mask when you are with many people,” my mother said to me. * A. My mother told me wear a face mask when I am with many people. B. My mother told me wore a face mask when I was with many people C. My mother told me to wear a face mask when I was with many people. D. My mother said me to wear a face mask when I am with many people. *

Nếu cho Hỗn hợp Z gồm 1,3 gam Zn và 1,2 gam CuO vào dd chứa 1,875g hcl thì hỗn hợp h2 (đktc) sinh ra sau phản ứng là bao nhiêu?

Tìm các số nguyên m sao cho (m – 1) là ước của (– 12) giúp mk nha

Tại sao có người cần tạo điều kiện thuận lợi cho hoa giao phấn và chủ động giúp hoa thụ phấn bổ sung?

Xác định kim loại R trong các trường hợp sau: a) Để phản ứng hoàn toàn với 9,6 gam kim loại R hóa trị II cần dùng hết 3,36 lít khí CO2 (ở đktc) b) Hòa tan hoàn toàn 8,1 gam kim loại R trong dung dịch HCl dư, thu được 10,08 lít H2 (đktc)

Trong bài thơ đi đường , mạch câu thơ thứ ba có gì khác so với mạch hai câu thơ đầu ? Ở câu thơ này tác giả muốn nói tới quy luật gì ? Mở ra tâm trạng của chủ thể trữ tình như thế nào ?

cho tỉ lệ thức: a/b=c/d. CMR: a ²/b ²=3a ²-2ac/3b ²-2bd