Viết về xã luận nói về cô 20-11

có 1 thửa ruộng có cd và cr là 60x40m. chủ thửa ruộng đã xây 1 con đường hình bình hành rộng 5m. tính diện tích còn lại khi đã xây con đường
Gúp m vs

a, Tìm tất cả các số tự nhiên n thỏa mãn 5n+7 chia hết cho 2n+1
b, Chứng minh rằng nếu n và 2n+1 là số tự nguyên tố thì 4n+1 hợp số
Cho mk cách làm lớp 6 ạ

Chứng minh 2999^2013-1998^2012-1003^2013 chia hết cho 2 và 5
Giúp em vs!

Mark the letter A, B, C or D to indicate the sentence that has a completed meaning by
using the words/ phrases given.
9. Nam/ like/ play badminton.
A. Nam like play badminton. B. Nam likes play badminton.
C. Nam like playing badminton. D. Nam likes playing badminton.
10. Our parents/ watch/ TV/ in/ living room.
A. Our parents are watching TV in the living room.
B. Our parents is watching TV in the living room.
C. Our parents do watching TV in the living room.
D. Our parents are watch TV in the living room.
11. What time/ Ba/ often/ listen/ music?
A. What time do Ba often listen to music?
B. What time does Ba often listen to music?
C. What time is Ba often listen to music?
D. What time are Ba often listen to music?
12. Lan/ have/ glasses/ and/ long/ black/ hair.
A. Lan is having glasses and a long black hair.
B. Lan have glasses and long black hair.
C. Lan has glasses and long black hair.
D. Lan has glasses and a long black hair.
 

Mark the letter A, B, C or D to indicate the sentence that is closest in meaning to each of
the following questions.
1. My favorite subject is English.
A. My sister doesn’t like English. B. I don’t like English.
C. I like English the best. D. I like History.
2. We have a sink, a cooker and a cupboard in our kitchen.
A. We don’t have a sink, a cooker and a cupboard in our kitchen.
B. There are a sink, a cooker and a cupboard in our kitchen.
C. There isn’t a sink, a cooker and a cupboard in our kitchen.
D. There is a sink, a cooker and a cupboard in our kitchen.
3. Nga has a book and it’s on the desk.
A. Nga’s book is on the desk.
B. Her book isn’t on the desk.
C. There is a book under the desk.
D. There are two books on the desk.
4. The cat is in front of the computer.
A. The cat is under the computer.
B. The computer is in front of the cat.
C. The computer is behind the cat.
D. There is a cat behind the computer.
5. I don’t have a bookshelf in my bedroom.
A. There is a bookshelf in my bedroom.
B. There isn’t a bookshelf in my bedroom.
C. I have a bookshelf in my bedroom.
D. There isn’t a bookshelf in her bedroom.
6. My mother likes the kitchen the best.
A. My mum doesn’t like the kitchen.
B. The kitchen is my mother’s favorite room.
C. The kitchen is my favorite room.
D. There is a nice kitchen in my house.
7. Our house is next to my teacher’s house.
A. Our house has a large bathroom.
B. My teacher’s house isn’t next to our house.
C. My teacher’s house isn’t near our house.
D. My teacher has a house next to our house.
8. Linh has a big window in her bedroom.
A. There is a big window in Linh’s bedroom.
B. There isn’t a big window in Linh’s bedroom.
C. There is a strange window in Linh’s bedroom.
D. In Linh’s bedroom, there is a strange window.