Giúpppppppppppppppp các ldolllllll

Câu 7. Cho các chất sau: CH3COOCH3, C2H5OOCCH3, CH3O-COH, CH2(COOCH3)2, (COOCH3)2, CH3-OOC-COOCH3. Số hợp chất nào là este của axit axetic ?

Bài 3: Phát biểu ‘đieu kiện cần và đủ’,C. mọi tam giác là tam giác cân khi và chỉ khi nó có 2 góc bằng nhau

Put the verd in brackets into the form Giúp nhanh vs ạ

Khối lượng CaO cần dùng để phản ứng vừa đủ 7,3 gam HCl là

Vẽ màm đuy Nl: các bạn nhận xét chữ h mik trang trú như thế nào ạ.-.

a) |$x^{4}$ + 7| = 5$x^{3}$ + 7 b) 3|x| - 11 = 5|-x| - 8 Giúp mik với!

( 4x - 3 ) . ( 4x - 3 ) - ( 3x + 2 ) . ( 3x - 2 ) ( 2x - 1 ) . ( 2x + 1 ) . ( 2x + 1 ) -4 . ( x^2 + 1 )

Exercise 11: Give the correct form of the verbs in brackets. 1. I(come) .......................... to meet you at the station next weekend. 2. I (wait) .......................... until you’re finished - then we can go. 3. John (study) .......................... until he knows all the answers. 4. She thinks that it (rain) .......................... next weekend. 5. What do you want to do after the class (finish) ..........................? 6. I think that the Democrats (win) .......................... the next election. 7. Jenny will come here after she (finish) .......................... work. 8. She’s going to look for a job as soon as she (arrive) .......................... in London. 9. I (give) .......................... up smoking! 10. She (send) .......................... me an email before she leaves the office today.

Hoàn thành các câu sau 1. Robin (play)..........football every Sunday 2. We (have).........a holiday in December every year 3. He often (go).........to work late 4. The moon (circle)..........around the earth 5. The flight (start)..........at 6 a.m every Thursday 6. Peter (not/study).........very hard. He never gets high scores 7. My mother often (teach).......me English on Saturday evenings