tăng số phần trăm là :

(10500 : 7200 x 100) - 100 % = 45,8333 %

năm ngoái mua được 35 kg đường thì nay mua được là :

(7200x35) : 10500 = 24 (kg)

Đ/s :........

l pick

 gọi chiều  rộng hình chữ nhật là a

 chiều dài hình chữ nhật là a*4

Theo bài ra ta có:

a*a*4=196

a*a=196/4

a*a=49

Mà 49=7*7

Suy ra chiều rộng hình chữ nhật là 7

Chiều dài hình chữ nhật đó là

7*4=28

 chu vi hình chữ nhật đó là

(7+28)*2=70

Đáp số :70 

Nhớ viết đơn vị nha ở đây bạn ko ghi

Chúc may mắn

x = 1 + 2 + 2 ^ 2 + 2 ^ 3 + ... + 2 ^ 2015 + 2 ^ 2016

x . 2 = ( 1 + 2 + 2 ^ 2 + 2 ^ 3 + ... + 2 ^ 2015 + 2 ^ 2016 ) x 2 

x . 2 = 2 + 2 ^ 2 + 2 ^ 3 + 2 ^ 4 + ... + 2 ^ 2016 + 2 ^ 2017 

x . 2 = ( 1+ 2 + 2 ^ 2 + 2 ^ 3 +  2 ^ 4 + ... + 2 ^ 2015 + 2 ^ 2016 ) + 2 ^ 2017 - 1

x . 2 = x + 2 ^ 2017 - 1

x = 2 ^ 2017 - 1 ( cùng chia cả 2 vế đi x )

Mã y = 2 ^ 2017 lá số hơn 2 ^ 2017 - 1 một đơn vị

=> x và y là 2 số tự nhiên liên tiếp

Giúp mk với^^ :

Question IV. Choose the correct answer.

Question V :Complete the sentences with although/in spite of/because/because of

1 Although it rained a lot, we enjoyed our holiday.

2 a, ……………………..... all our careful plans, a lot of things went wrong.

b, ………………... we'd phoned everything carefully, a lot of things went wrong.

3 a, I went home early ……………….……... I was feeling unwell.

b, I went to work the next day………………… .... I was still feeling unwell.

4 a, She only accepted the job ....................................... the salary, which was very high.

b, She accepted the job ……………………………….. the salary, which was rather low.

5 a, I managed to get to sleep ………………………... there was a lot of noise.

b, I couldn't get to sleep ………………………………...... the noise.

Question VI: Make one sentence from two. Use the word(s) in brackets in your sentences.

1 I couldn't sleep. I was very tired.

Despite I couldn't sleep despite being vey tired.

2. They have very little money. They are happy.

In spite of .......................................................................................................................................

3. My foot was injured. I managed to walk to the nearest village.

Although ........................................................................................................................................

4. I enjoyed the film. The story was silly.

In spite of .......................................................................................................................................

5. We live in the same street. We hardly ever see each other.

Despite ..........................................................................................................................................

6. I got very wet in the rain. I was only out for five minutes.

Even though ..................................................................................................................................

Question VII. Rewrite sentences with In spite of / Despite /because / because of

1. Although Tom was a poor student, he studied very well.
à In spite of _______________________________________________________________
2. Mary could not go to school because she was sick.
à Because of _______________________________________________________________
3. Although the weather was bad, she went to school on time.
à Despite _______________________________________________________________
4. Because there was a big storm, I stayed at home.
à Because of _______________________________________________________________
5. In spite of his good salary, Tom gave up his job.
àAlthough_____________________________________________________________

6. He is so young. His acting is excellent.

à Although_______________________________________________________________

7.The film poster is fascinating. I don't want to see this film.

àIn spite of___________________________________________________________________

8.Although our plan is careful, we made some mistakes.

àDespite_____________________________________________________________

​

20,17*104-20,17*4

=20,17*(104-4)

=2017

dài quá má ơi,đùa hả