cau 1 : 20

cau 2 :280

9 + 87 = 96

Dấu ? là 87

bạn nhé

Relative clause:

1) Astronomy is one of the world oldest sciences. It is the study of planets and stars.

➞ Astronomy which is the study of planets and stars is one of the world oldest sciences

2) The vegetables are grown without chemicals. They are sold in supermarkets.

➞ the vegetables which are sold in supermarkets are grown without chemicals

3) People have marched to London. They are protesting against pollution.

➞ people who are protesting against pollution have marched to London

4) The police never found the money. It was stolen in the robbery.

➞ the police never found the money which was stolen in the robbery

5) There was a big red car. It had been parked outside the house.

➞ there was a big red car which had been parked outside the house

6) Libya is a leading producer of oil. It is a country in North Africa.

➞ Libya which is a country in North Africa is a leading producer of oil

7) A chemical company has been bankrupt. It employed 4000 people.

➞ A chemical company which employed 4000 people has been bankrupt

8) A new drug may gives us eternal youth. It was developed by a British university.

➞ A new drug may which was developed by a British university gives us eternal youth

9) A new motorway is planned. It will cost 500 million pound.

➞ A new motorway which will cost 500 million pound is planned

10) Some weapons belong to the IRA. They are found at a flat in Bristol.

➞ Some weapons who are found at a flat in Bristol belong to the IRS

11) John Quincy Adams was born on July 11, 1767. He was the sixth president of the United States.

➞ John Quincy Adams who was the sixth president of the United States was born on July11, 1767

12) There were some children. They were swimming in the river.

➞There were some children who were swimming in the river

13) Tennis fans have been queuing all night at Wimbledon. They hope to buy tickets.

➞ Tennis fans who hope to buy tickets been queuing all night at Wimbledon

14) Some paintings haven't been found yet. They were stolen from the museum.

➞Some paintings which were stolen from the museum haven't been found yet

15) Two languages, Finnish and Swedish, are used in Helsinki. It is the capital of Finland.

➞ Two languages, Finnish and Swedish which is the capital of Finland are used in Helsinki

\(\frac{2x+3}{5x+2}=\frac{4x+5}{10x+2}\)

\(\Leftrightarrow\left(2x+3\right).\left(10x+2\right)=\left(5x+2\right).\left(4x+5\right)\)

\(\Leftrightarrow\left(20x^2+30x\right)+ \left(4x+6\right)=\left(20x^2+8x\right)+\left(25x+10\right)\)

\(\Leftrightarrow20x^2+30x+4x+6=20x^2+8x+25x+10\)

\(\Leftrightarrow30x+4x+6=8x+25x+10\)

\(\Leftrightarrow34x+6=33x+10\)

\(\Leftrightarrow34x-33x=10-6\)

\(\Leftrightarrow x=4\)

A = { x ∈ N* I x < 8}

D = { x ∈ N I x : 2, 1 < x < 19 }

E = { x ∈ N I x ko : 2, 0 < x < 22 }

20 con gà

Mấy bn cứ đăng mấy bài này đặng tăng điểm hỏi đáp

Rewrite the following sentences by using cues

1. I spend of a lot of time doing homework yesterday( It takes)

-> it takes me a lot of time to do homework yesterday

2. Mayday is a day, workers match to show their solidarity on that day.( when)

-> Monday is a day when workers match to show their solidarity

3. There will be a new road.It wil be built througn our neighbourhood(V p2)

=> There will be a new road which wil be built througn our neighbourhood

số các số hạng của dãy là :

          ( 100 - 1 ) :1 + 1 = 100 ( số hạng )

Tổng của dãy trên là : 

          ( 100 + 1 ) x 100 : 2 = 5050 

                            Đáp số : 5050