1. table / house / 2 How many tables in your house ? There are 2 tables._____________________________________________________________

2. students / class / 20 How many students in your class? There are 20 students.__________________________________________________________

3. desks / classroom / 12 How many desks in your classroom? There are 12 desks.________________________________________________________

4. armchairs / living room / 4 How many armchairs in the living room? There are 4 armchairs.______________________________________________________

5. lamps / room / 1 How many lamps in your room? There are 1 lamp.____________________________________________________________

6. televisions / living room / 1 How many televisions in the living room? There are 1 television.____________________________________________________

xv=15

1. School ..finishes............. at 4.30 p.m. every day.

2. ...Do........... you often  ...eat............. lunch in the school canteen?

3. Where ...are....... you, Phong? (bài này mình bị kiểm tra sai bài này)

4. It's warm today . I .....want to....... ... stay........ at home now.What about .going......... swimming in the river?

5. Listen! ..Are....... they  .singing.......... in the classroom

6. My family likes  ...spending.......... our summer holidays at the seaside.

a/3x(12x - 4 ) -9x (4x -3 ) = 30 
 36x^2 - 12x - 36x²+27x = 30 
15x = 30 

 x=2

b/  5x -2. x^2 + 2.x^2 -2x = 15

     5x -2x = 15

    3x = 15 => x= 5

z vừa vừa thôi làm j nhiều vậy không có s nữa

Đặt \(B=\frac{2}{3}.\frac{4}{5}.\frac{6}{7}.\frac{8}{9}....\frac{100}{101}\)

Diện tích hình thang đó là :

( 17 + 12 ) x 5 : 2 = 72,5 ( m² )

ĐS: 72,5 m²

đây mình chỉ cách được nhiều GP nek bạn muốn biết hk

tùy người hay thì đúng 

mấy cái chấm đen là gì ????!!!