II. 1. B => to have 

2. B => is

3. C => potatoes

4. B => some

5. A => like

6. D => eating

7. D => for

8. D => favorite 

9. B => grams

10. C => of orange

11. A => much

12. B => sandwiches

13. A => doesn't

14. C => and

15. D => an

16. D => doesn't

17. C => does

18. D => me

19. A => much

20. D => of apple

21. B => much

22. D => some

24. B => any

25. A => much

III. 1. He swims every day.

2. Ba goes jogging every day.

3. Mai plays badminton every afternoon.

4. The children are playing volleyball at the moment.

5. My father goes jogging every day.

6. She does aerobics every morning.

7. Nam is playing table tennis at the moment.

8. His friends are swimming now.

9. He feels tired now.

10. Miss Vui eats vegetables every day.

IV. 1. What do you do?

2. What does she do?

3. What does he do?

4. What are they doing?

5. What is she doing?

6. How does he feel?

7. What does Mai do?

8. What are you doing?

9. What does Hoa do in her free time?

10. Where do you go in your free time?

11. Do they play soccer?

12. Do they swim every Sunday?

13. Do you often go fishing in your spare time?

14. What do you do in your free time? 

15. What does he do on the weekend?

5 x 12 x 3 x 7 / 3 x 8 x 7 x 5 = 3/2

2 x 5 x 4 x 6 / 4 x 3 x 5 x 7 = 4/7

a) ĐKXĐ: \(\begin{cases}x\ne0\\x\ne-5\end{cases}\)

b) A = \(\frac{5x-50-\left(x-5\right)\left(2x+10\right)-x\left(x^2+2x\right)}{2x^2+10x}\) = \(\frac{-x^3-4x^2+5x}{2x^2+10x}\) = \(\frac{-x^2-4x+5}{2x+10}\) 

= \(\frac{\left(1-x\right)\left(x+5\right)}{2\left(x+5\right)}\) =\(\frac{1-x}{2}\) 

c) Để A = 3 => \(\frac{1-x}{2}\) = 3 =>1 - x = 6 => x = - 7(t/m ĐKXĐ)

3/2: February, the third or the third of February
20/11: November, the twentieth
2/9: September, the second
31/10: October, The thirty - first
1/1: January, the first
8/3: March, the eighth
26/3: March, the twenty - sixth 
30/4: April, the thirtieth
1/5: May, the first
25/12: December, The twenty - fifth

mình ngán đến tận cổ mấy bài này rùi cô mình giao rất nhiều bài này

1. knew

2. wouldn't have

3. asks

4. would get

5. were - would tell

6. did - would succeed

1. won't go

2. wasn't

3. is

4. stopped

5. had come

6. saves

Chu vi hình vuông đó là :

5 x 4 = 20 ( cm )

Diện tích hình vuông đó là :

5 x 5 = 25 ( cm² )

Đáp số : chu vi : 20 cm

             diện tích : 25 cm²

Tick đúng mình nha !!!

mình hướng dẫn nhé:

Ta có BOC= 180-(OBC+OCB)

                  = 180-(1/2 ABC+1/2 ACB)

                  = 180-1/2(ABC+ACB)

                  = 180-1/2(180-BAC) = 180-(90-1/2 BAC)= 180- 90 +1/2 BAC= 90+1/2 BAC >90

=> BOC là góc tù

mình làm hơi tắt và chưa có kí hiệu góc nhé