Cho 2 số có tổng là 90. Biết rằng nếu lấy số lớn trừ đi số bé rồi cộng với tổng của chúng thì được 126. Số bé là bao nhiêu?

Ai làm giúp 2 bài này với ạ em cảm ơn

Ai giúp em với ạ huhu để em nộp bài ạ

Tính từ năm 40 ( khởi nghĩa Hai Bà Trưng) cho đến năm hiện tại là bao nhiêu năm, bao nhiêu thập kỉ , thế kỉ

giúp e với mn ơiiiiiiiiiiiiiiiiiiiiiii

Thủyphânhoàntoàn2,64gam estecóCTPTlàC4H8O2trongdungdịchNaOHthuđược2,04g muối.XácđịnhCTCTđúngcủaeste. Giải hộ mình với ạ

Giúp tui đi hứa vote 5 sao và ctlhn ><

III Fill the blanks with an adjective and a preposition A: polite keen kind satisfied good tired annoyed interested surprised​worried typical , wrong , afraid , disappointed, different 1 My home town looks very...............what it did 25 years ago. 2 I'd rather not walk home alone. You see. I'm..........the dark. 3 Joe is very----------------his new computer. It's the second time it's broken down. 4 Don't ask me to play squash. I'm not...........ball games. 5 I'm a bit-------Susan. She's been looking quite depressed recently. 6 When I told him that I'd scratched his car, I thought he was going to get really...................me. 7 I wouldn't say that Robert is just------------football. I'd say he was football mad. 8 Haven't you got any other records? I'm.............listening to this music; 9 My driving instructor said she isn't...............my progress and that I'll have to have a lot more practice before I take my test. 10 Ruth is........a career in tourism when she leaves school. 11Thank you. It was very---------you to drive me all the way home. 12 A shop assistant always has to be............the customers - even when they are rude to her. 13 So John has forgotten your anniversary again ? That's absolutely................him! 14 What's-----------the car this morning? Why won't it start? 15 It was only a cheap restaurant but we were................how good the food was

Tính số mol của các chất sau: a) 2,0g NaOH b) 3,36 lít O2 ( điều kiện tiêu chuẩn) c) 4,48 lít H2S( điều kiện tiêu chuẩn) d) 200 ml dung dịch H2SO4 ( điều kiện tiêu chuẩn)

mn ơi, giúp mk với ạ Question 11: I invited him to join our trip to Bai Dinh pagoda, but he___________ my invitation. A. turn up B. turned down C. looked for D .look up to Question 12: I wish people ____________well aware of preserving the environment. A. is B. are C. will be D. were Question 13: They can’t decide when _______________a new house. A. buy B. to buy C. bought D. buying Question 14: It must be incredible travelling by dogsled. I wish I ______ it. A. can do B. could did C. could do D.can done Question 15: When we arrived at the station, the train ________________________. A. went B. had gone C. has gone D. would go Question 16. Huy is ________________ the most successful student in my class. A. so long B. by how C. by far D. so now Circle the letter A, B, C or D to indicate the most suitable response to complete each of the following exchanges. Question 17: - Tuan: “Thanks a lot for your help. ” – Minh: “____________.” A.Go ahead. B.I don’t care C. Stay calm. D. Don’t mention it. Question 18: - Been: “He has to work 12 hours everyday”. – Peter: “____________.” A. Sure. B. How cool! C. Wow, I can’t imagine that. D. I wish I could go back to that time. Circle the letter A, B, C or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. Question 19: We should try to preserve every custum and tradition. A. act out B. entertain C. collect D. keep alive Question 20: I’ll take the new job whose salary is fantastic. A.reasonable B.acceptable C.pretty high D. wonderful