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10 tháng 8 2021

1. After he had graduated from the National University, he worked as a physicist.

2. John had done his homework before he went to bed.

3. Peter wishes he had studied hard at university.

4. Mai said she had seen their former teacher the previous afternoon.

5. After we had lived in Ha Noi for ten years, we moved to Ho Chi Minh City.

6. Who does this bag belong to?

7. I prefer cycling to traveling by motorbike to work.

8. After he had left school, he joined the army.

9. When were you born?

10. Why is this computer out of order?

11. She is looking forward to meeting her cousin again.

1. We were driving along a narrow road when the car broke down.

2. David and I wanted to go off to search for help but Bill insisted I stay near the car.

3. By working hard, he succeeded in finishing the job in time.

4. However, I and David didn't agree and David pointed out a path which I will probably lead to a village.

5. We followed the path but soon we were hopelessly lost.

6. After 1 hour or so, we began to feel very frightened.

7. Then, David fell and cut his arms and legs.

8. I decided to climb the tree to see where we were.

13 tháng 8 2021

1. After he had graduated from the National University, he worked as a physicist.

 

2. John had done his homework before he went to bed.

 

3. Peter wishes he had studied hard at university.

 

4. Mai said she had seen their former teacher the previous afternoon.

 

5. After we had lived in Ha Noi for ten years, we moved to Ho Chi Minh City.

 

6. Who does this bag belong to?

 

7. I prefer cycling to traveling by motorbike to work.

 

8. After he had left school, he joined the army.

 

9. When were you born?

 

10. Why is this computer out of order?

 

11. She is looking forward to meeting her cousin again.

 

1. We were driving along a narrow road when the car broke down.

 

2. David and I wanted to go off to search for help but Bill insisted I stay near the car.

 

3. By working hard, he succeeded in finishing the job in time.

 

4. However, I and David didn't agree and David pointed out a path which I will probably lead to a village.

 

5. We followed the path but soon we were hopelessly lost.

 

6. After 1 hour or so, we began to feel very frightened.

 

7. Then, David fell and cut his arms and legs.

 

8. I decided to climb the tree to see where we were.

NV
6 tháng 1 2022

\(3x\left(x-y\right)+x-y\)

\(=3x\left(x-y\right)+1\left(x-y\right)\)

\(=\left(x-y\right)\left(3x+1\right)\)

\(=\left(x-y\right)\left(3x+1\right)\)

19 tháng 2 2022

ok anh ơi

Bài 4: 

\(x=130^0\)

4 tháng 12 2021

cụ thể hơn đc ko ạ

Bài này quá dễ 

x/40 - x/50= 1/3

<=>5x/200 - 4x/200=1/3

<=> x/200= 1/3

<=> x= 200/3.

1 tháng 5 2019

bạn ê, mik bị ngu toán, lười suy nghĩ ấy mà nên đừng nói dễ hay khó j vs mik

Bài 4:

a: a\(\perp\)c

b\(\perp\)c

Do đó: a//b

17 tháng 4 2022

\(\left|2x-3\right|=3-2x\)

\(ĐK:x\le\dfrac{3}{2}\)

\(\Leftrightarrow\left[{}\begin{matrix}2x-3=3-2x\\3-2x=3-2x\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{3}{2}\\0=0\left(đúng\right)\end{matrix}\right.\)

Vậy \(S=\left\{x\in R;x=\dfrac{3}{2}\right\}\)

2 tháng 7 2021

2 do

3 usually buy

4 press

5 enjoy

6 has

7 goes

8 gets

9 eat

10 doesn't study

11 doesn't eat

12 doesn't water

13 don't go

14 doesn't eat - is

15 Do - go

16 Do - agree

17 Do you have

18 Do you often eat

19 Does - start

20 does he come

21 does - work

22 does

23 does - do

24 does- go

2 tháng 7 2021

Cảm ơn ạ!haha

23 tháng 9 2021

Xét tam giác ABH vuông tại H có:

\(sinB=\dfrac{AH}{AB}=0,5\Rightarrow AB=\dfrac{AH}{0,5}=\dfrac{5}{0,5}=10\)

Xét tam giác ABH vuông tại H có:

\(AB^2=AH^2+BH^2\left(Pytago\right)\)

\(\Rightarrow BH=\sqrt{AB^2-AH^2}=\sqrt{10^2-5^2}=5\sqrt{3}\)