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bạn viết ra đi

1 think

2 that

3 said

4 that

5 that

6 tell

7 that

8 that

9 that

10 that

11 think

12 assurance

13 that

14 That

15 That

b: Xét ΔMNP vuông tại M có MH là đường cao

nên \(NH\cdot NP=MN^2\left(1\right)\)

Xét ΔMNK vuông tại M có MQ là đường cao

nên \(NQ\cdot NK=MN^2\left(2\right)\)

Từ (1) và (2) suy ra \(NH\cdot NP=NQ\cdot NK\)

what the hell sao nhìu zữ zậy?

cầu 24 :

a) ( 6.8⁴ - 5.8³ + 8² ) : 8²

= ( 6.4096 - 5.512 + 64 ) : 8²

= ( 24576 - 2560 + 64 ) : 8²

= ( 22016 + 64 ) : 8²

= 22080 : 8²

= 22080 : 64

= 345

b) ( 5.9² + 3⁵ - 2.3³ ) : 3²

= ( 5.81 + 243 - 2.27) : 3²

= ( 405 + 243 - 54 ) : 3²

= 594 : 3²

= 594 : 9

= 66

c) ( 2.3⁴ + 3² - 7.3³ ) : 3²

= ( 2.81 + 9 - 7.27 ) : 3²

= ( 162 + 9 - 189 ) : 3²

= -18 : 9

= -2

d) ( 6.2³ - 5.2⁴ + 2⁵ ) : 2³

= ( 6.8 - 5.16 + 32 ) : 2³

= ( 48 - 80 + 32 ) : 2³

= 0 : 2³

= 0 : 8 

= 0

câu 25 : mk hướng dẫn cách giải để nhanh hơn nhé !

a) thay x = -2 ; y = -2 ( hoặc x = y = -2 )vào biểu thức ... * bạn tự ghi lại đầu bài phép tính nhé ! " ta có :

rồi bạn thay phần x,y bằng số -2 vào, r sau đó bạn tính toán số mũ trc,  trong ngoặc tròn trc, ngoặc vuông rồi ngoặc nhọn và cuối cug là phép tính ở ngoài ngoặc nhé!

25:

a: \(=\dfrac{15x^5y^3}{5x^2y^2}-\dfrac{10x^3y^2}{5x^2y^2}+\dfrac{20x^4y^4}{5x^2y^2}\)

\(=3x^3y-2x+4x^2y^2\)

\(=3\cdot\left(-1\right)^3\cdot2-2\cdot\left(-1\right)+4\cdot\left(-1\right)^2\cdot2^2\)

\(=-6+2+16=18-6=12\)

b: \(=\dfrac{4x^4y^2+3x^4y^3-6x^3y^2}{x^2y^2}=4x^2+3x^2y-6x\)

\(=4\cdot\left(-2\right)^2+3\cdot\left(-2\right)^2\cdot\left(-2\right)-6\cdot\left(-2\right)\)

\(=4\cdot4-6\cdot4+6\cdot2=8-24+12=-4\)

c: \(=-3xy+6-9y^2=-3\cdot\dfrac{1}{2}\cdot4+6-9\cdot4^2\)

=-9*4^2

=-9*16=-144

d: \(=\dfrac{1}{6}y^3-\dfrac{1}{3}x^3=\dfrac{1}{6}\cdot3^3-\dfrac{1}{3}\cdot\left(-3\right)^3=\dfrac{191}{6}\)

1............to work by car everyday

2 ........Khanh does morning exercise, he won't keep fit

3......has a small garden

4 .....has to go to school on time

5 ......she doesn't go to bed early, she will be late for class

6 .......go to the movie tonight

\(\text{⩷!⨙┏⇴⨗⨜}\)

V Transformation

1 In spite being quite poor, the villagers live a happy and healthy way

2 Despite studying very hard, he still didn't pass the exam

3 Although Sylvia had no interest in folklore, she still enjoyed the story

4 Despite having much experience in machinery, he didn't succeed in repairing this machine

5 Though it was dark, they continued to work

6 In spite of having health problems, he is always smiling

7 Despite the difficult exam, Kieu Anh got good marks

8 THe man about whom I told you works in the hospital

9 Do you know the girl to whom Tom is talking?

10 The tree which stankds near the gate of my house has lovely flowers

11 The book which I was reading yesterday was a lovely story

12 Do you know the new student whose name I can't remember?

13 I will never forget the day when I first met her

14 The country where I was born is beautiful

15 Because of the polluted water, it was unsafe to drink

16 Because he work hard and methodically, John succeeded in his exam

17 I suggest getting together and talking about our presentation before we do it in class

18 When did you built this stilt house?

19 If you don't hurry up, you will be late for school

20 You must turn off the TV before 11p.m