x + x + x + x + ....+x +x + 1 + 2 + 3 + .... + 100  = 5750

            100x                  +      5050                    = 5750

            100x                                                      = 5750 - 5050

            100x                                                      =    700

                 x                                                       = 700 : 100

                  x                                                       = 7

Salesgirl : Can I ___help_______ you?

Mai : Yes. ______I____ _____would_____ _____like_____ a bowl of noodles and a glass of Coca-Cola.

Salesgirl : Here _____you_____ ______are____.

Mai : Thanks. _____How_____ _____much_____ are they?

Salesgirl : Eighteen thousand dong. Thank you.

1. What does Mai want?

She wants some noodles and some Coca-Cola.

2. How many noodles does she want?

She want a bowl of noodles.

3. How much Coca-Cola does she want?

She wants a glass of Coca-Cola.

4. How much are they?

It's Eighteen thousand dong

5. Where is she?

She is at the canteen.

{a₁b₁,a₁b₂,a₁b₃,a₂b₁,a₂b₂,a₂b₃}

Vì AH = 1/2 BC  \(\Rightarrow\)AH là đường trung trực \(\Rightarrow\) H là trung điểm của BC \(\Rightarrow\)AH là đường trung tuyến của \(\Delta\) ABC 

Xét \(\Delta\)  AHB và \(\Delta\) AHC, có:

AH là cạnh chung

BH=HC ( H là trung điểm BC )

góc AHB = góc AHC ( = 90 độ )

\(\Rightarrow\) \(\Delta\) AHB = \(\Delta\) AHC ( c-g-c)

\(\Rightarrow\)góc ABH = góc ACH 

hay góc B = góc C = 30 độ

You have a ___broken___ leg. You should go to see the doctor soon.

1. "If I were you,I wouldn't buy this car" said Mai
Mai advised me not to buy that car.
2. "Shall I carry your suicase, Minh?"said Nam.
Nam offered to carry Minh's suitcase.
3. "Yes,all right,I'll share the food with you,Dave." said Anna
Anna agreed to share the food with Dave.
4. "Can you remember to buy some bread?" said Paul
Paul reminded me to buy some bread.

Lên google search cho đầy đủ^^

À mà lớp mấy vậy? Học IELTS cơ á =='

\(12^8.9^{12}=4^8.3^8.9^{12}=2^{16}.9^4.9^{12}==2^{16}.9^{16}=\left(2.9\right)^{16}=18^{16}\)

Cái đó không có đáp án =='

Cơ mà nếu có, chẵng lẽ phải chụp hết ảnh lên?

1,When my brother and I were small we used to go swimming every afternoon

2.When I open the newspaper,I always find (inform) information about sports

3.Sửa lỗi sai: The food was delicious, but most things weren't cheap