đồ thị có dạng \(y=ax+b\) 

đồ thị đi qua A(4;9) suy ra \(4a+b=9\)(1)

đồ thị đi qua 8(1;9;2) suy ra \(a+b=\frac{9}{2}\)-> b= \(\frac{9}{2}-a\)(2)

thay (2) vào (1) ta có \(4a+\frac{9}{2}-a=9\)-> a=\(\frac{3}{2}\); b= 3

đồ thị cần tìm là \(y=\frac{3}{2}x+3\)

Bài 1:

1. We couldn't start our journey. All flights..........because of fog

A. are delayed B. delayed C. has been delayed D. were delayed

2. English .........all over the work

A. speaks B. is being spoken C. spoke D. is spoken

3. Jill came to the meeting but Charles.......

A. isn't B. hasn't C. didn't D. wasn't

4. Tony now rides his bike to school instead of.....by bus

A. travel B. travels C. to travel D. travelling

5. Hung......go fishing with his uncle when he lived in the countryside

A. used to B. is used to C. has used to D. who used to

Cái dì dậy ?

rearrange the sentences to make suitable conversation by writing the correct number (from 51 to 55) in the box.

51) 3 A. Because our major sources of energy are running out while the solar energy is abundant and unlimited.

52) 4 B. I know it is also clean and sake to the environment. But does it cost a lot of money to install the solar panels on the roofs?

53) 5 C. I don't think so. The solar panels are becoming cheaper and easy to install.

54) 1 D.I think that solar energy can be an alternative sources of energy in the near future.

55) 2 E. Why do you think so?

Rewrite the sentences using the word(s) in brackets. The first one is done for you.

a. My favorite subjects are English ang History. ( interested in )

=> I'm interested in English and History.

b. Nam often sings very well. ( good at)

=> Nam is good at singing.

c. American students take part in different activities at recess. ( participate)

=> Different activities at recess are participated by American students.

=> American students participate in different activities at recess.

d. Let's go to the zoo and have some fun ( why don't we)

=> Why don't we go to the zoo and have some fun?

e. They are doing their homework. They are listening to music, too. ( at the same time)

=> They are doing their homework and listening to music at the same time.

f. No one in the class is taller than Hoa. (tallest)

=> Hoa is the tallest in her class.

Có 2 ý: Tâm 22 tuổi và Tâm 23 tuổi => Có 1 trong 2 ý sai

Nếu ý : Tâm 22 tuổi sai thì Tâm ít hơn Lan 2 tuổi và nhiều hơn Mùi 1 tuổi là đúng

=> Ở ý kiến của Lan: ý Mùi 25 tuổi là sai . ở ý kiến của Mùi: ý Lan nhiều hơn Tâm 3 tuổi là sai
Vậy Tâm 23 tuổi => Lan 25 tuổi và Mùi 22 tuổi

giúp mk vs, mk đang cần gấp lắm!!!

BẢNG ĐỘNG TỪ ĐÂU RỒI BẠN?

I, Điền từ vào chỗ chấm
It was important FOR me to get home early as Maggie and Colin were coming over BEFORE dinner . But when i got TO the station I saw that it was crowed THE people waiting FOR train delayed because IT'S the bad weather , just then , a car pulled up and a man inside shouted TO me , offering me a lift . My first reaction was to be suspicious ABOUT him , until I realize that it was Maggie's brother . He said he was going my way and he'd be glad TO the company TO the drive home ON the snow.

Làm đại thôi bởi vì câu chuyện lãng xẹt :v