Bài 1: Có 1 quyển sổ 200 trang. Hỏi cần đánh bao nhiêu chữ số 0

21. The picture was painting by Michael last year. A B C D 22. There’s the woman who she sold me the handbag. A B C D 23. Mr. Smith is going to buy a new Japanese car, doesn’t he? A B C D 24. I met a lot of interesting people while I was studying at Ho Chi Minh City. A B C D 25. If I were you, I didn’t buy that expensive car. A B C D

(1/2-1/3):1/3 Tìm 40ab chia hết cho 2 3 5

Rút gọn và tính giá trị của biểu thức sau 1) A = x(x + 1) - (x + 2)^2 tại x = 1 2) B = (5x + 2) (2x - 7) - (2x + 5) (2x - 5) tại x = -3 3) C = (x - 2)^2 - (x - 3)(x + 3) tại x = 2 4) D = (2x - 3)^3 + (4x + 1) (16x^2 + 4x + 1) 5) E = (3x + y)^3 - (x + 2y)(x^2 - 2xy + 4y^2)

Tính nhẩm:Tổng hai số bằng 8, hiệu của chúng cũng bằng 8. tìm hai số đó

Các bạn giúp mình bài này vs nha. Câu 1 mk làm rồi nhưng cũng không biết đúng không nữa. Nếu sai cau 1 thì các bạn cứ tự do sửa lại nhé. Mình cảm ơn các bạn.

Mn giúp em tính diện tích BEN Đề: cho chóp S.ABC có đáy ABC là tam giác đều cạnh 2 căn 3, mặt bên SAB cân với ASB =120 và nằm trong mp vuông góc với . M tđ SC, N tđ MC, E tđ AC

1Do you believe that people your age in country live ecologically friendly lifestyle?why? 2. Do you think that banning plastic bags is a good idea?why 3. What are the advantages of hybrid cars?why 4. In what ways do alternative fuels benefits society? Why? 5. Why do some people do resist nuclear energy? 6. Do you think there is a danger that the hole in the ozone layer will grow? Why? 7. How has people's awareness of green issuse changed over the last 50 years in your country? 8. What are your prediction for the state of the environment your country in next few year? 9. What do you think the ecological state of your country will be like in 50 year's time? 10. Do you think the air quality in the place where you live is getting better or worse ? What make you say that? 11. Do you think that people energy consumption is changing?why

. When he lived in the city, he _________to the theater twice a week. A. uses to go B. has gone C. used to go D. was going

2:we (not work)...on our school project tonight 3:It(not rain)much in the winte.It(rain)in the summer a lot