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giúp mik vơis

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1) Phu Quoc Island

2) big rocks

3) look for the shells

4) make a sandcastle

5) Swim

1, Phu Quoc island

2, big rook

3, look for the shells

4, make a sandcaste

5. swim

it was pouring with rain down there
she would come and see me on Friday if that was all right
club had lost quite a lot of money the previous month
she would have finished writing the report by the time I got there
she had enjoyed herself the previous night
what the most interesting sights were
if I had got a town plan
where they could stay
how long the film lasted
if there were guided tours
which way the castle was
Nick to stay for lunch
Martin to see a doctor
for having caused so much trouble
going out for the day
to do the washing up
to post the letter
having made a mistake
Mike not to touch the electric wires
if I were taking much money with me to France

Ét ô ét~

a: \(\Leftrightarrow n+2\in\left\{1;-1;5;-5\right\}\)

hay \(n\in\left\{-1;-3;3;-7\right\}\)

b: \(\Leftrightarrow n-1-2⋮n-1\)

\(\Leftrightarrow n-1\in\left\{1;-1;2;-2\right\}\)

hay \(n\in\left\{2;0;3;-1\right\}\)

c: \(\Leftrightarrow3n-6+8⋮n-2\)

\(\Leftrightarrow n-2\in\left\{1;-1;2;-2;4;-4;8;-8\right\}\)

hay \(n\in\left\{3;1;4;0;6;-2;10;-6\right\}\)

S

S

3/8 của 160 kg là 60kg

sai

diện tích tam giác = (chiều cao x cạnh đáy):2
diện tích hình thang = (đáy lớn + đáy bé) x chiều cao :2

Diện tích tam giác : Giả sử có \(\Delta ABC\) và có \(AH\) là đường cao

+, Đối với tam giác thường : \(S=\dfrac{1}{2}\times AH\times BC\)

+, Đối với tam giác vuông : \(S=\dfrac{1}{2}\times AB\times AC\)

Diện tích hình thang : Giả sử có hình thang \(ABCD\) và \(AH\) là đường cao

\(S=\dfrac{1}{2}\left(AB+CD\right)\times AH\)

Diện tích hình tam giác : Độ dài đáy nhân với chiều cao ( cùng một đơn vị đo ) rồi chia cho 2

TL:

9/21;10/21;11/21;12/21

cứu

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