2:

V=8*3,5^2*pi=307,72cm³

mấy bài này dễ bạn nên tự làm

áp dụng hệ thức Vi-et là ra mà

nhiều thế này hả OMG .

a: Theo đề, ta có hệ phương trình:

\(\left\{{}\begin{matrix}-a+b=-20\\3a+b=8\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}a=7\\b=8-3a=8-3\cdot7=-13\end{matrix}\right.\)

1 visited -> visit

2 on -> by

3 are -> is

4 far -> often

Q6.

1. visited->visit.

2. on->by

3. are->is

4. far->often

Chúc bn hok tốt!!

lớp 5 có cái này à, sao tôi chưa bao h làm vậy

I Need Your Love

Calvin Harris

I need your love
I need your time
When everything's wrong
You make it right
I feel so high
I come alive
I need to be free with you tonight
I need your love

I need your love

I take a deep breath every time I pass your door
I know you're there but I can't see you anymore
And that's the reason you're in the dark
I've been a stranger ever since we fell apart
I feel so out of sea
Watch my eyes are filled with fear
Tell me do you feel the same
Hold me in your arms again

I need your love
I need your time
When everything's wrong
You make it right
I feel so high
I go alive
I need to be free with you tonight
I need your love

I need your love

Now I'm dreaming, will ever find you now?
I walk in circles but I never make it out
What I mean to you, do I belong
I try…

Bn tự tìm nha ! K mk

vch có cả đề văn như vậy à em ? giáo viên dạy văn thật là thú dị ~_~ 

1.to go->go

2.going->go

3.at->for

4.brush->brushes

5.takes->take

6.have->has

7.where->why

8.an->a

9.to->at

10.because->so

1.to go->go

2.going->go

3.at->for

4.brush->brushes

5.takes->take

6.have->has

7.where->why

8.an->a

9.to->at

10.because->so 

Nè bạn !