Dạ em có đáp án rồi, em cảm ơn

no biết nhưng ks cho mik nhé

1.what is your nationality ?

My nationality is Vietnamese

2.tell me about your last summer

Last summer vacation, I went to Ha LOng Bay with my family. It was sunny but not very hot. His parents sat in the sun and talked. My younger sister and I went swimming. Then, we went to some souvenir shops. We bought a lot of different gifts for our friends. Next, my family went to a food stall for lunch. We ate fish and crab. The food was delicious, but most things were not cheap. They were quite expensive. Finally, We took a lot of photos and went to home by bus. After trip, we felt very happy because we had a great time get together. Our trip was great, if my family next time I travel, I will invite you to go with my family.

3.how can we protect our environment ?

eight Simple Things You Can Do to Help Protect the Earth

1. Reduce, reuse, and recycle. Cut down on what you throw away. ...
2. Volunteer. Volunteer for cleanups in your community. ...
3. Educate. ...
4. Conserve water. ...
5. Choose sustainable. ...
6. Shop wisely. ...
7. Use long-lasting light bulbs. ...
8. Plant a tree.

chúc bạn học tốt

Ansewer :

1: What is your nationality - My nationality is Vietnamese.

2: Tell me about your last summer - Last summer I visited my grandparents in a Hanoi.

3: We don't littering and don't burning forest​.

The Titanic (sink) sank in 1912.

em học lớp 4 ạ, có sai sót mong anh chị thông cảm

A P B C N Q M

+) AP // BC => S ( BCP ) = S ( BAC ) = S (1)

+) AP //BC => Theo talet: \(\frac{PN}{NM}=\frac{AN}{NC}=\frac{1}{2}\)( vì AC = 3AN ) 

Theo menelaus xét trong tam giác PMC

\(\frac{CQ}{PQ}.\frac{NP}{NM}.\frac{BM}{BC}=1\)=> \(\frac{CQ}{PQ}.\frac{1}{2}.\frac{1}{3}=1\)=> CQ = 6PQ => CP = 7 QP 

=> \(\frac{S\left(QPB\right)}{S\left(CPB\right)}=\frac{QP}{CP}=\frac{1}{7}\)

=> S ( QPB ) = S/7

A B C M I D N Q

Có AB//PM => \(\frac{PI}{IB}=\frac{IN}{IA}\left(1\right)\)

Có AD//BC \(\Rightarrow\frac{DI}{IB}=\frac{IA}{IC}\left(2\right)\)

Từ (1)(2) => \(\frac{IN}{IA}=\frac{IA}{IC}\Rightarrow IA^2=IN\cdot IC\)

Xét \(\Delta PMC\) cắt tuyến BQ. Áp dụng Menelaus

\(\Rightarrow\frac{PQ}{QC}\cdot\frac{CB}{BM}\cdot\frac{MN}{NP}=1\)

\(\Leftrightarrow\frac{PQ}{QC}\cdot\frac{3}{1}\cdot\frac{2}{1}=1\Rightarrow\frac{PQ}{QC}=\frac{1}{6}\Rightarrow\frac{PQ}{PC}=\frac{1}{7}\)

Có \(S_{ABC}=S_{PBC}\Rightarrow S_{PBQ}=\frac{1}{7}S=\frac{S}{7}\)

What are you going to do ? : Bạn định làm gì ? ( nếu bạn hỏi về nghề nghiệp thì )

  - I plan to be a teacher 

 How is your friend ? : bạn của bạn thế nào ?

   - My friend is normal

 Why are you here ? : Tại sao bạn ở đây ?

   - because I accidentally , I'm here

I'm here to see u

Ta có: a = 4b + 1 

=> a + 7 = 4b + 1  + 7= 4b +  8 \(⋮\)b 

=> 8 \(⋮b\) và b là số tự nhiên 

=> b\(\inƯ\left(8\right)=\left\{1;2;4;8\right\}\)

+ b =  1=> a = 5 => a + 2b = 5 +2 .1 = 7 là số nguyên tố ( thỏa mãn )

+) b = 2 => a = 9 => a + 2b = 9 + 2 . 2 = 13 là số nguyên tố ( thỏa mãn )

+) b = 4 => a = 17 => a + 2b = 17 + 2.4 = 25 không là số nguyên tố ( loại )

+) b = 8 => a = 33 => a + 2b = 49 không là số nguyen tố ( loại )

Vậy có các cặp (a; b ) là ( 5; 1) và ( 9; 2).