\(a)2(x+2)^2-100\)\(=62\)

suy ra \(2(x+2)^2 =62+100\)

suy ra \(2(x+2)^2=162\)

suy ra \((x+2)^2=162/2\)

suy ra \((x+2)^2=81\)

suy ra\(x+2=9 hay x+2=-9\)

suy ra x=9-2=7 hay x=-9-2=-11

b)5.2^x-2^x+1=48

suy ra \(5.2^x-2^x.2=48\)

suy ra \(2^x.(5-2)=48\)

suy ra \(2^x.3=48\)

suy ra \(2^x=48/3=16\)

suy ra\(2^x=2^4\)

suy ra \(x=4\)

Đổ đầy bình 10\(l\), đổ sang bình 16\(l\)trong bình 16\(l\)có 10\(l\)

Đổ đầy bình 10\(l\),đổ sang bình 16\(l\)đã có sãn 10\(l\)bên trong cho tới khi đầy. Trong bình 10\(l\)có: 10 - 6=4\(l\)

Vậy cần san sớt nước ít nhất 4 lần

Tổng 2 số đó là :

32 x 2 = 64

Số bé là :

( 64 - 12 ) : 2 = 26

Số lớn là :

64 - 26 = 38

Đáp số : 26 và 38

1. The girls are play tennis at the moment.

=> The girls are playing tennis at the moment.

2. Both my brothers likes sport

=> Both my brothers like sport

3. Anna wearing her new coat today

=> Anna wears her new coat today.

4. What colour you like best?

=> What colour do you like best?

5. My suitcase is weighing ten kilos

=> My suitcase is ten kilos

6. At the moment I stay at a hotel

=> At the moment I am staying at a hotel

7. Robert catch the same bus every morning

=> Robert catches the same bus every morning

8. What is this word here mean

=> What is this word mean?

6. Her ticket was shown to the airline agent by her

7. His friend's shoes is lent by he

8. Her relatives were left her fice millon pounds

9. These boxes were handed to the customer by the shop assistant.

10. The first prize was awarded to the reporter by the board.

1. This dish is brought to me by the waiter

2. We are sent these by our friends.

3. They were told this story by their grandmother when they visited her last week.

4. This train ticket was ordered for his mother by Tim

5. The special cameras weren't shown to me by you.

Is

Mrs Ha told Ba to carry those books  back home

=> Mrs Ha had Ba carry those books back home 

1. Do

2. Playing

3.For

4. Or

5. Aren't

1. I read some / any books on my holiday

2. Jim hasn't got any money / moneys for the ticket

3. Lisa wrote some letter / letters to her aunt

4. Is / Are there any bananas in your bag?

5. Did you eat some / any rice?

6. There isn't / aren't any lemonade in the bottle

7. My father asked some information / informations about the new service

8. Some cats has / have got big ears

9. This is a / an dictionary

10. I didn't put some / any salt into the soup yesterday

11. I have done it for a / an hour

12. Can you see some / any clouds in the sky?

13. Tina has got some box / boxes

15. Does / Do any students leave their homework at home?