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20 tháng 9 2021

2 tá \(=24\)

Muốn mua 8 cái bút chì cần trả \(30000:24\times8=10000\left(VNĐ\right)\)

Số tiền phải trả khi mua 8 cái bút là:

\(30000:24\cdot8=10000\left(đồng\right)\)

1.   Rewrite the following sentences without changing the meaning, using the word given Giups em vs ak cảm ơn ạ11.My sister goes to school on foot.  My sister                                                                                                                                            _12.The bank is not far from the post office. The bank is                                                                                                                                       ...
Đọc tiếp

1.   Rewrite the following sentences without changing the meaning, using the word given

 Giups em vs ak cảm ơn ạ

11.

My sister goes to school on foot

.

 

 

My sister                                                                                                                                            _

12.

The bank is not far from the post office.

 

The bank is                                                                                                                                        _

13.

There are many flowers in our garden.

 

Our garden                                                                                                                                            

14.

Ba lives in town.

 

Ba doesn't                    _                                                                                                                     

 

15.

Nam lives in the city.

 

Nam doesn't

3
20 tháng 1 2022

11.

My sister goes to school on foot

.

 

 

My sister walks to school.                                                                                                                                            _

12.

The bank is not far from the post office.

 

The bank is near the post office.                                                                                                                                        _

13.

There are many flowers in our garden.

 

Our garden has many flowers.                                                                                                                                            

14.

Ba lives in town.

 

Ba doesn't live in the countryside.                   _                                                                                                                     

 

15.

Nam lives in the city.

 

Nam doesn't live in the countryside.

11. My sister walks to school.
12. The bank is near the post office.
13. Our garden has many flowers.
14. Ba doesn't live outside the city.
15. Nma doesn't live in the countryside.

17 tháng 1 2021

a=5k+1

Cho \(0\le5k+1\le100\)

=> \(0\le k\le19\)

Có 20 giá trị của k => A có 20 phần tử

Cảm ơn nha.

1 tháng 6 2018

Do AC, BD, KE là 3 đường cao nên chúng luôn đồng quy tại 1 điểm nên AC,BD,KE cùng đi qua 1 điểm

24 tháng 2 2022

1. Have you met

2. did

3. are you going

4. Do you watch

5. have you lived

6. Did you have

7. did she wear

8. do 

9. What have you done

10. Have you gone

15 tháng 3 2022

\(=\left(\dfrac{\sqrt{x}\left(\sqrt{x}+3\right)}{\left(\sqrt{x}+3\right)\left(\sqrt{x}-3\right)}-\dfrac{4}{\sqrt{x}\left(\sqrt{x}-3\right)}\right).\left(\dfrac{\sqrt{x}+2+\sqrt{x}-2}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+2\right)}\right)\)

\(=\dfrac{x-4}{\sqrt{x}\left(\sqrt{x}+3\right)}.\left(\dfrac{2\sqrt{x}}{x-4}\right)=\dfrac{2}{\sqrt{x}+3}\)

16 tháng 3 2022

\(B=\dfrac{\sqrt{x-3-2\sqrt{x-3}+1}}{\sqrt{x-3}-1}=\dfrac{\sqrt{\left(\sqrt{x-3}-1\right)^2}}{\sqrt{x-3}-1}=\dfrac{\sqrt{x-3}-1}{\sqrt{x-3}-1}=1\)