Giúp mình với ạ: Tính giá trị của biểu thức: aP = 5x(x2 – 3) + x2(7 – 5x) – 7x2

choose the bast answers. câu1:she walks as if she a wooden leg. A:has. B:have. C:had. D:have had. cau2:Mr Jone ate as if she anything for days. A:didn't eat. B:haven't eaten. C:hadn't eaten. D:not ate. cau3:I watch the football game than basketball game. A:like. B:would rather. C:prefer. D:would like. cau4:It is essential that he the bike. A:to repair. B:should repair. C:would repair. D:repairs. cau5:would you rather in ink or pencil. A:write. B:writing. C:to write. D:wrote. cau6:I have never seen such a beautiful dress you before. A:of. B:on. C:for. D:in. cau7:small children are often told that it is rude to point other people. A:on. B:to. C:at. D:for. cau8:A ban was given all trade in ivory in 1989. A:with. B:on. C:for. D:from. cau9:there was a huge decline the number of panda. A:in. B:for. C:of. D:out. cau10: her boss refises her a raise. A:giving. B:to give. C:gine. D:A&B correct.

|x-7|-x=7 |3x-4|+4=3x |7-2x|+7=2x làm giúp nhé, ko cần nhanh đâu

Một bể nước hình chữ nhật có chiều dài 2,8m, chiều rộng 1,4m, chiều dài 1,5m.Nước trong bể hiện chiếm 45% thể tích a) Hãy tính thể tích của bể chứa nước. b) Hỏi hiện trong bể có bao nhiêu lít nước?. Người ta thả một khối kim loại vào bể thì mặt nước cách bể một khoảng 0,3m.Tính thể tích của khối kim loại.

Tính nhanh 135 + 165 + 215 + 300 + 185

giúp e với ạ mng ! e vote 5 sao ạ :)

I. Put the verb in bracket into the present continuous tense or simple present tense. 1. What ____________ she (cook)________________ for dinner tonight? 2. What__________ she often (do) ___________ in the evening? 3. The last train (leave) __________ the station at 11 o’clock. 4. Keep silent! You (talk) ___________so loudly. 5. I (not stay) __________________ at home at the moment. 6. Now she (lie) __________________to her mother about her bad marks. 7. At present they (travel) ___________to New York. 8. He (not work) _____________in his office now. 9. Hoa (have)________________ a birthday party tonight. 10. We (practice) ______________ speaking English now. 11.He (paint) ____________the pictures at the moment. 12.Be careful! The car (go) _____________so fast. 13.Listen! Someone (cry) _____________in the next room. 14.Your brother (sit) ______________next to the beautiful girl over there at present? 15.Now they (try) _________________ to pass the examination. 16.It’s 12 o’clock, and my parents (cook) ____________ lunch in the kitchen. 17.She can’t stay (long) ____________giúp với

(5 căn 1/5+1/2 căn 20-5/4 căn( 4/5 +căn 5)):2 căn 5 giúp mk vs :(

Mn giải chi tiết cho e tại sao hs y=sinx lại nghịch biến trên khoảng (π/2 + k2π ; 3π/2 + k2π) ạ:(

Complete the conversations using the pairs of verbs in the box. Use “be + past participle”, “get + (object) + past participle”, or “have + (object) + past participle”. Add the object in brackets where this is supplied and give alternatives where possible. own – break into /cut – clean / catch – infect / wake up – throw out 1. A: You’re looking tired. B: I ………………………… early by my neighbor’s dog. A: Don’t they keep it inside at night? B: Usually, yes, but I think it must………… because it was barking so much. 2. A: James looked different somehow. B: He’d……………………… (his hair) A: Yes, and I think he’d……………………… It looked much smarter! (his jacket) 3. A: What an amazing house! B: It ………………… by Jason Norman. You know, the rock singer. A: I know him, yes. B: The problem is, he’s never there, and it keeps ………………………… 4. A: What happened to your coat? B: I ……… on some barbed wire as I was climbing over a fence. I hurt my arm, too. (it) A: Ouch. That looks nasty. You ought to go to the doctor. It might…………