G:

Giả sử a là số ngày ít nhất mà hai bạn cùng trực nhật ( a thuộc N*)

Vì cứ 10 ngày An lại trực nhật một lần và cứ 12 ngày Bình lại trực nhật một lần nên => a thuộc BC(10;12) mà a là ít nhất nên => a là BCNN(10;12)

Ta có : 10 = 2 . 5

12 = 2³ . 3

Suy ra BCNN(10;12) = 2³ . 5 . 3 = 60

Vậy a = 60 hay sau 60 ngày thì cả hai bạn lại trực nhật cùng nhau

(P/s : nhưỡng chỗ thuộc đó viết bằng ki hiệu \(\in\) nha)

+) A : Is our neighbourhood modern ?

B : Yes , it is

+) A : Is the streets in our neighbourhood wide ?

B : No, it isn't

A : Is it narrow ?

B : Yes, it is

dài quá bạn, bạn nên đăng từng bài một thôi, không thì nhìn rối mắt lắm

G:

Welcome to London ! London is on the river Thames and it is a capital city of England. London is a hictoric city with many old buildings and beautiful parks.

Ok, let's start our tour ! First, go to Buckingham Palace. To get there, walk for 20 minutes. Then, turn right and go straght ahead for 20 minutes. It's on your right. Second, go to Westminter Cathedral. To get there, go straight ahead for 10 minutes. It's on your left. Finally, go to Tate Gallery. To get there, go along Buckingham Palace Road for 25 minutes.Then, turn left and it's on your left.

tỉ số phần trăm vốn của quyển sách là:

100%-25%=75%

tiền vốn của quyển sách là:

3500:100x75=2625(đồng)

G:

Welcome to London ! London is on the river Thames and it is a capital city of England. London is a hictoric city with many old buildings and beautiful parks.

Ok, let's start our tour ! First, go to Buckingham Palace. To get there, walk for 20 minutes. Then, turn right and go straght ahead for 20 minutes. It's on your right. Second, go to Westminter Cathedral. To get there, go straight ahead for 10 minutes. It's on your left. Finally, go to Tate Gallery. To get there, go along Buckingham Palace Road for 25 minutes.Then, turn left and it's on your left.

Unit bao nhiêu bạn ?

G:

Welcome to London ! London is on the river Thames and it is a capital city of England. London is a hictoric city with many old buildings and beautiful parks.

Ok, let's start our tour ! First, go to Buckingham Palace. To get there, walk for 20 minutes. Then, turn right and go straght ahead for 20 minutes. It's on your right. Second, go to Westminter Cathedral. To get there, go straight ahead for 10 minutes. It's on your left. Finally, go to Tate Gallery. To get there, go along Buckingham Palace Road for 25 minutes.Then, turn left and it's on your left.

Bạn cho đề bài đi, mình viết cho

Bài viết tả về trường mình bằng tiếng anh hả bạn ?