Ôi không ! Chặt phá rừng làm giấy wc sao ?

wc= vệ sinh

tôi đã nhìn thấy câu hỏi của anh ấy sau 9 năm

1, Mount Everest is ……​the………… highest mount in the wall. 
2, I would like to buy ………a……… new clothes but I haven’t ……the………… money. 
3, Are there ………a……… letters for me today? 
Yes, there is only one from New York. 
4, I have got ……a………… little money left, let’s have dinner in …………the…… restaurant. 
5, My mother goes to …the…………… church in …………the…… morning and …the…………… afternoon goes to visit ………the……… friends. 
6, It takes me half ……a………… hour to get to work by ………a……… bus. 
7, What does ………the……… post office sell apart from stamps? 
8, I want to buy …an…………… envelope and …………the…… fifty thousand dong phone card. 
9, Viet would like to send his sister in ………the……… USA ………a……… letter. 
10, Go along this road and take ………the……… second turning on ………the……… left. 

Điền a/an/the hoặc some :

1, Mount Everest is ……the……… highest mount in the wall. 
2, I would like to buy ………some……… new clothes but I haven’t ………the……… money. 
3, Are there ………some……… letters for me today? 
Yes, there is only one from New York. 
4, I have got ………a……… little money left, let’s have dinner in ……the………… restaurant. 
5, My mother goes to ………the……… church in …………the…… morning and ………the……… afternoon goes to visit ………the……… friends. 
6, It takes me half ………a……… hour to get to work by ………ko dien……… bus. 
7, What does ………the……… post office sell apart from stamps? 
8, I want to buy ………an……… envelope and ………the……… fifty thousand dong phone card. 
9, Viet would like to send his sister in ……the………… USA ……a………… letter. 
10, Go along this road and take ……the……… second turning on ………the……… left. 

khôn thế

câu 1:

điều kiện để  x² <x là :

ko có điều kiện nào

Bài 1 : Làm

Ta có : \(\frac{a}{b}=\frac{3}{5}\Rightarrow\frac{a}{3}=\frac{b}{5}\)

\(\Rightarrow\frac{3a}{9}=\frac{b}{5}\)

Áp dụng tính chất dãy tỉ số bằng nhau, ta có :

\(\frac{3a}{9}=\frac{b}{5}=\frac{3a-b}{9-5}=\frac{17,2}{4}=4,3\)

\(\Rightarrow a=\frac{4,3.9}{3}=12,9\)

\(b=4,3.5=21,5\)

Vậy \(a=12,9\)

\(b=21,5\)

a, 4

b, 3

c, 4

d, 3

e, -4/7

f, 0.5

a, 4                 e, -4/7                 f, 0,5

b,3

c,4

d,3

4^5=2^10

9^4=3^8

2*6^9=2^10*3^9

thì cái tử sẽ đc:

2^10*(-3)

mẫu e phân tích tt

\(a:\dfrac{3}{5}\in N\Rightarrow3a⋮5\Rightarrow30a⋮50\)

\(a:\dfrac{10}{7}\in N\Rightarrow10a⋮7\Rightarrow30a⋮21\)

\(\Rightarrow30a⋮BCNN\left(50;21\right)\)

\(\Rightarrow39a⋮1050\)

\(\Rightarrow a⋮350\)

Mà a nhỏ nhất => a = 350