27,501

17,5 : y - 7,5 : y = 0,25
(17,5 - 7,5)   : y = 0,25
       10          : y = 0,25
                       y = 10 : 0,25
                       y = 40

Chiều dài cái sân là:
    (326+54):2=190( m)
Chiều rộng cái sân là:
    326-190=136(m)
Diện tích cái sân là:
    136.190=25840(m2)

Đs: 25840 m2

(x  :2) +14 = 32
(x : 2)        = 32 - 14
(x : 2)        = 18
=> x : 2           = 18 
     x                 = 18 x 2
     x                 = 36  

Câu D 

Chiều dài mảnh đất:
30 + 10 = 40 (m)
Diện tích mảnh đất:
40 x 30 1200 (${\mathrm{m}}^2$)
Diện tích trồng cây ăn quả:
1200 x 90% =1080 ( ${\mathrm{m}}^2$)
Đổi: 1080${\mathrm{m}}^2$ = 0,108 ha
Đáp số 0,108 ha

Phân tích đa thức: x² - xy + x - x thành nhân tử ta được
A. (x - y)(x + 1)
B. x(x - y)
C. xy(x + 1)
D. (x + y)(x - 1)

Câu B đúng

2100mm²=21cm²

1. I'm a student at Pho Vinh primary school.
2. I visit my grandparents in the morning.
3. I can play chess.
4. I have English on Monday and Wednesday

What did you do yesterday, Mai ? 

The city is big and busy.

1/ How many lessons do you have, Honda?
2/ My village is small and quiet.
3/ Where will you be this weekend?
4/ She  learns to write by writing emails to her friends.
Question 3
My nam is Nam. l'm ten (0) years old. Ninh Binh is my (1) hometown l line in a small and quiet (2)village My home is near a (3) river There are 5 rooms in my beautiful house. l live with my (4) family. My school is not (5) far from my home . l have some (6) good friends. They also go to the same school as me. l love my hometown very much.

A: When's the Women's Day?
B: lt's on 3th August

(-27).(18+82)=-27.100=-2700