Chứng minh biểu thức :n(2n-3)-2n(n+1) chia hết cho 5 với n€Z

-3.(x+2)+4.(x-3)=15 giúp em với

Giải giúp mình nhanh nha,câu 1 b thôi

Giúp em với :( 1. I hope (have)……………………..a job. 2. Try to avoid (make)…………………….him angry. 3. He is thinking of (leave)…………………….his job. 4. It’s no use (wait)……………….. 5. Whenever we met, Jack avoided (look)……………….at me. 6. Most people enjoy (travel)………………..to different parts of the world. 7. May I change the TV channel, or do you want (watch)………………more of this program? 8. Joan is considering (change)………………..her major from pre-med studies od spychology. 9. They agreed (leave)………………….early. 10. It was a nice day, so we decided (go)…………………for a walk. 11. There was a lot of traffic, but we managed (get)…………………to the airport in time. 12. They don’t have much money. They can’t afford (go)…………………out very often. 13. We’ve got a new computer in our office. I haven’t lerned how (use)…………………..it yet. 14. I wish that dog would stop (bark)…………………… It’s driving me crazy. 15. We were hungry, so I suggested (have)……………….dinner early.

Sử dụng dạng so sánh hơn của các trạng từ trong ngoặc viết lại bằng 2 cách 1. The Great Wall was built earlier than the White House. = = 2.Homes in the city are often better furnished than those in the countryside. = = 3. A racing driver drives more skillfully than a normal motorist. = = 4. A house is more beautifully decorated at New Year than during the year. = = 5. A lion runs faster than a horse = =

b) 800mm2 = ... cm2 12 000hm2 = ... km2 150cm2 = ... dm2... cm2

Tìm tất cả các số nguyên dương `a,b` sao cho `a+b^2` chia hết cho `a^2b-1`

Cho dãy số : 1,2,3,4...........,124,125. Hỏi dãy số có bao nhiêu chữ số

Vẽ cây nấm nhé =))))) full màu nheeee Lâu không vẽ trình tụt hẳn. Mấy bạn trả lời đi, mình live game xong mình chọn hn UwU

-What does your brother do? à What is.........................................................................................? 2-What do you do? What is .............................................................................................? 3. The red dress is cheaper than the black one. à The black .................................................................... 4. The white car looks older than the black one.  The black car .......................................................................... 5. The dinner is so delicious. à What ..................................................................! 6. The school is very new. à What ...................................................................................! 7. There is a sink and a tub in the bathroom. à The bathroom ............................................................... 8.My father looks after sick children in Xuyen A hospital.  My father takes ..................................................................... 9. He is looking after her grandmother because she feels sick. à He is taking ................................................................................. 10-It isn’t difficult to do this exercise. It is ..................................................................................................................