co : (97-18):2+1=42 so tick nha Trần Mai Dương

sentence transformation

1.they were doing the bedroom on friday.

Friday they make the bedroom

2.they're washing the dishes now.

Now they are washing dishes

3.they will paint the ceiling pink.

They painted the pink ceiling

4.martha delivers the letters to their office everyday.

Martha provides daily mail to their office.

5.the police have arrested him.

He was arrested by the police

7.does he do his homework in the evening?

In the evening he did his homework

8.the police are interviewing all the witnesses.

All witnesses are being interviewed by the police

mình không chắc chắn về bài mình làm

Chọn đáp án đúng :

1 , Hoa , Lan and Nga filled in their medical ....................

a , books b , check-up c , texts d , records

2 , Theire parents ............. them to see Tri Nguyen Aquarium .

a , brought b , went c , led d , took

3 , I need to know your .............. . Oh , you're one meter 45 centimeters tall .

a , height b , mouth c , temperature d , age

4 , What did you think of Nha Trang ?

a , It's my thought

b , Oh , that's right

c , I though of it

d , Oh , it was beautiful

5 , What's the matter , Hoa ? - ......................

a , No , thanks

b , Thanks

c , It's the matter

d, I have a toothache

chúc bạn học tốt

1. to buy

2. takes

does it take

3. are rehearsing

4. are they going to spend

5. don't wear

6. is

am going to visit

7. goes

playing

gọi các cạnh của tam giác đó lần lượt là a,b,c

ta có: \(\dfrac{a}{2}=\dfrac{b}{3}=\dfrac{c}{4}=\dfrac{a+b+c}{2+3+4}=\dfrac{45}{9}=5\)

Áp dụng tính chất dãy tỉ số bằng nhau ta có :

\(\dfrac{a}{2}=5\Rightarrow a=2.5=10\left(cm\right)\)

\(\dfrac{b}{3}=5\Rightarrow b=3.5=15\left(cm\right)\)

\(\dfrac{c}{4}=5\Rightarrow c=4.5=20\left(cm\right)\)

vậy 3 cạnh của tam giác lần lượt là : 10cm ; 15cm; 20cm.

tóc của anh ấy dài , màu nâu và lượn sóng

\(\left(-3\right)^8.\left(-6\right)^2\)

=6561.36

=236196

            Gọi số người của đoàn quân đó là x

x chia hết cho 22;24;32

=> x là BC_(22;24;32)

22=2 x 11

24=2³  x 3

32=2⁵

=> BCNN_(22;24;32)=2⁵ x 3 x 11 = 1056

BC_(22;24;32) =B₍₁₀₅₆₎ = {0;1056;2112;3168;4224;5280;...}

Mà 4000<x<4500

nên x =4224

xin lỗi nha mình ko thể giải cho bạn được !