\(\left(3x-2\right):45=3:\left(3x-2\right)\)

\(\Rightarrow3x-2=15\left(3x-2\right)\)

\(\Rightarrow3x-2=45x-30\)

\(\Rightarrow45x-3x=30-2\)

\(\Rightarrow42x=28\)

\(\Rightarrow x=\frac{2}{3}\)

TL
 

x = \(\frac{2}{3}\) - \(\sqrt{15}\) 

x = \(\sqrt{15}\)+ \(\frac{2}{3}\)

HT

a.lục lạp

TL :

Tề bào thực vật có lục lạp

HT

3x + 2 ⁝ 2x + 1

=> 2( 3x + 2 ) ⁝ 2x + 1

=> 6x + 4 ⁝ 2x + 1

=> 3( 2x + 1 ) + 1 ⁝ 2x + 1

Mà 3( 2x + 1 ) ⁝ 2x + 1

=> 1 ⁝ 2x + 1

=> 2x + 1 = 1 

=> 2x = 0

=> x = 0 ( thỏa mãn )

\(3x+2⋮2x+1\)

\(\Rightarrow2\left(3x+2\right)⋮2x+1\)

\(\Rightarrow6x+4⋮2x+1\)

\(\Rightarrow6x+3+1⋮2x+1\)

\(\Rightarrow3\left(2x+1\right)+1⋮\left(2x+1\right)\)

Vậy 2x+1 thuộc Ư(1)=1

\(2x+1=1\Rightarrow2x=0\Rightarrow x=0\)

21,1 km = 2110 ha

5,05 m = 505 dm

6,03 kg = 6003 g

TL :}}}}}}}}}} 

TL :

0,05 hm vuông = 500 m²

HT

bằng 5m vuông

c.nghèo khổ

trong cá từ dưới đây từ nào không phải từ láy:

a.tồi tàn

b.rách rưới

c.nghèo khổ

d.gầy gò

12YTDYTF

tổng trừ hiệu chia khoảng cách + 1

là b nha bạn

tiếng im gồm những bộ phận cấu tạo nào?

a.chỉ có vần

b.chỉ có vần và thanh

c.chỉ có âm đầu và vần

d.chỉ có âm đầu,vần và thanh

TL

tham khảo nha bn chứ tui ko bít làm :}} 

 (y’ = 4x – 3;y’ = 0 Leftrightarrow x = {3 over 4};yleft( {{3 over 4}} ight) =  – {1 over 8})

Đỉnh (Ileft( {{3 over 4}; – {1 over 8}} ight))

Công thức chuyển trục tọa độ tịnh tiến theo

(overrightarrow {OI} :left{ matrix{
x = X + {3 over 4} hfill cr
y = Y – {1 over 8} hfill cr} ight.)

Phương trình của ((P)) đối với hệ tọa độ (IXY) là

(Y – {1 over 8} = 2{left( {X + {3 over 4}} ight)^2} – 3left( {X + {3 over 4}} ight) + 1 Leftrightarrow Y = 2{X^2})

k cho tui nick naruto nha thank 

Question 1. The trainer ___________ some interns how to use the printer in the company.

A. is instructing B. instructs C. instruct D. are instructing

Question 2. Harry Potter is the most famous __________series. Everyone s its magical world.

A. horror B. adventure C. fantasy D. roman

Question 3. My father is very _________. He always makes other members laugh. A. funny B. talkative C. unfriendly D. boring

Question 4. Spoken all _________ the world, English has become the international language.

A. up B. on C. in D. over

Question 5. ________ are many other clubs to join at school.

A. Here B. There C. They D. We

Question 6. You can learn new things from school activities and enjoy ________ hobbies.

A. your B. his C. her D. my

Question 7. __________ people think that Music and Art are not important subjects.

A. any B. lots C. much D. many

Question 8. It is necessary to _________ hard for brighter future.

A. working B. work C. works D. worked

Question 9. This word is so strange. I need to look it _________ in a dictionary.

A. to B. at C. up D. in

Question 10. It's a lovely day. Let's _________ in the garden. It will be delicious! A. have a barbecue B. make a barbecue C. do a barbecue D. take a barbecue

Question 11. I’m interested in mountains, rivers and countries. I __________.

A. Arts B. physics C. Geography D. History

Question 12. - Kitty: " Why don't you register for the anime club?” – Peppa: “__________”

A. That’s a good idea.

B. You’re welcome

C. No, I don’t

D. Yes, I do


Question 13. I didn’t do all the homework, so my teacher complained that I was _________.

A. lazy B. hard -working C. selfish D. friendly

Question 14. _____she _________ her class today?

A. Is/attending B. Does/attends C. Does/attending D. Is/attends

Question 15. I (waiting) __________ for the bus. Do you know when it comes?


A. wait B. waited C. am waiting D. had waited

Question 16. Your ruler is over there. This one is ____________ .

A. hers B. her C. she D. you

Question 17. I enjoy _________ video games with my friends. My mom only lets me play after I finish my homework.

A. play B. to play C. playing D. plays

Question 18. – Is her car over there? - No, that isn’t ______ car. It’s mine.

A. her B. she C. hers D. theirs

Question 19. - Suga: “Do you want something to eat?” - Jin: “_________. I’m so fat now.” A. No, thanks

B. Great! Thanks

C. Yes, I will

D. Yes, I would

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Question 20. They isn’t paying attention to the lesson because he's talking in the class.

A. isn’t B. paying C. because D. he’s

Question 21. Look! The plane lands on the airport.

A. The B. lands C. on D. airport

Question 22. My sister s watches roman films, but I action films.

A. B. watches C. but D. s

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions

Question 23 I don’t Arts. We don’t P.E, either.

A. We don’t Arts and P.E.

B. We don’t Arts but P.E.

C. We don’t Arts with P.E.

D. We don’t Arts or P.E.

Question 24. I having a barbecue on weekends. I also going shopping.

A. I having a barbecue or going shopping on weekends.

B. I don’t want to have a barbecue or go shopping on weekends.

C. I having a barbecue and going shopping on weekends.

D. I having a barbecue on weekends, but I also going shopping.

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

Question 25. This is my pen.

A. This pen is mine.

B. My pen is not this pen.

C. Mine is this.

D. This pen is my.

Question 26. What is your favorite school activity?

A. Which school activity do you more?

B. How is your school activity?

C. What’s do you ?

D. What school activity do you ?

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

Question 27. A. listen B. flight C. kind D.

Question 28. A. able B. table C. plate D. possible

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

Question 29. A. northern B. geography C. famous D. history

Question 30. A. magic B. expenCsive . possible D. helpful