Một chiếc hộp bằng miếng bìa hình chữ nhật có chiều rộng và dài lần lượt là 70 cm và 150 cm được cắt ra bằng các hình vuông bằng nhau và dựng thành một chiếc hộp. (chiếc hộp không có nắp). Thể tích lớn nhất của chiếc hộp là bao nhiêu? Mn giúp em câu này với ạ em cảm ơn nhiều ạ

Cho tg ABC cân tại B, biết góc A= 40độ. Tính các góc B và góc C

Exercise2. Circle the best answer A, B, C or D to complete the sentences 1. Nga broke the glass and her mom is very angry A. She broke the glass B. she is breaking the glass C. She has just broke the glass D. She breaks the glass 2. Mr Long began to work in this company 10 years ago A. He is worling in this company B. He has worked in this company for 10 years C. He works in this company D. He will work in this company next year 3. I am very hungry now A, I have not eaten anything yet B. I do not eat anything C. I did not eat anything D. I will not eat anything 4. Nhunf: Would you like to see the film" Gone with the wind"? Hang: Thank you. I saw it last week A. Hang is seeing the film B. Hang was seeing the film C. Hang will see the film next week D. Hang has already seen the film 5. They hane gor married since 2008 A. When they get married B. How long have they got married C. How long did they ger married D. Whrn will they get married

Tổng S = -2+4-8+16 -32+64-...+(-2)^n-1 +(-2)^n với n>1 n€ N*

Làm hộ mk vs đang cần gấp chắc dễ mak!!!

Cho hình vẽ mô tả thí nghiệm điều chế khí Y từ chất rắn X Khí Y có thể là khí nào sau đây? A: NH3 B: HCl C: O2 D: Cl2

1. Four countries ______________ (visit) by John so far. 2. London ______________ (have) a population of eight million people. 3. The Statue of Liberty in New York is a monument which ________ (symbolize) freedom. 4. Vietnam’s Independence Day ________________ (celebrate) on September 09th. 5. We ______________ (visit) Sydney Opera House for several times. 6. Some activities ______________ (prepare) to celebrate the lunar new year now

U1 = -4 , Un = -1/2 Un-1,n >=0 . Tìm công thức tổng quát

Exercise 4. Complete the dialogue. Use the present perfect with" just, already and yet". Vicky: You haven't done your project yet(you/ not do/ your project/ yet), I suppose Rachel: No, I haven't.(1)................................................ Vicky: (2)..........................................(I/just/see/Andrew), and he says(3)...................................(he/already/ do) about half of it Rachel: Well, he works too hard. Vicky:(4)...........................................(I/not/finish/ my phan/yet). Rachel: (5).........................................(you/already/ begin) toworry about it, haven't you? Take easy. There's plenty of time. Vicky:(6)..........................................(we/ already/ spend) too long thinking about it.(7).....................................................(I/not /do/ any real work/ yet) and (8).........................................(I/ iust/realize) that there are only four weeks to the end of term. Rachel: OK. (9).................................................(I/just / decide) to start next week. Well, maybe

Điền từ cinf thiếu: Man Thi ..... .... is my idol.