Giải phương trình giúp em với ạ

Help part 2:(((((((((((((((((((((((((

Tính hợp lí A = (2+7+12+...+497):50 B = 2021-2020+2019-2018+...+3–2+1

1. “ Do you sleep at least eight hours a day?” The doctor asked me.  The doctor asked …………………………………………………………………………………… 2. My village does not have access to clean piped water. I wish…………………………………………………….…………………………………………… 3. She has taught her children to play the piano for 4 years. She started…….……………………………………………………………………………………… 4. We are not sure where we should hang the painting. (use: TO) ………………. ……………………………………………………………………………………… 5. About you: What did you usually do when you were young? (use: USED TO) ………………………………………………………………………………………………………….. giúp mình vs ạ

Cho tam giác ABC. Trên cạnh AB lấy 2 điểm D, F sao cho AD=DF=FB. Các trung tuyến AE, BG của tam giác ABC lần lượt cắt CD, CF tại H, K. CM: GH, EK, AB đồng qui

1. We wish there (be) _________ a smart board in our classroom. 2. We (do)_____________ gardening when it rained. 3. My mother advised me (not stay) ____________up late. 4. Robert told me that his father (fly)___________to Da Lat the previous year.. giúp mình vs ạ

mấy bạn làm giúp mình nha, mình đang cần gấp..

1. The children in my home village used to go ________, even in winter. Now they all have shoes. A. on foot B. bare footed C. play around D. playing around 2. The cost ______ living in Singapore is higher than any countries in South East Asia. A. of B. on C. for D. in 3. Should we try to _________every custom or tradition which is in danger or dying out? A. preserve B. act out C. collect D. use 4. Could you tell me _________ to sign my name? A. when B. what C. how D. where 5. I really wish I could make _________ decisions. A. informed B. encouraged C. embarrassed D. confident 6. It’s difficult to _____________ changes in technology. A. put up with B. face up to C. keep up with D. deal with 7. Traditional games ___________ an important role in children’s intellectual life. A. take B. bring C. make D. play 8. We are really __________ that all of us passed the final exam. A. frustrated B. delighted C. disappointed D. unsatisfied 9. Choose the underlined word/phase which is grammatically incorrect. The teacher told me that I can attend the course for the higher level program that I had applied for. A B C D 10. _ “Mom, I’ve got the first rank in the class this semester!” _ “____________” A. Let’s go B. Thank you C. Well done D. You’re welcome. 11. Choose the word that has different stress syllable from the others: disappointed/ adolescence/ environment/ independence 12. Choose the word whose underlined part is pronounced differently from that of the others: A. operate d B. empathised C. expected D. concentrated giúp mình vs a

1. Many ethnic people in the mountainous areas are ___________. They can’t read or write. (ILLITERACY) 2. Teenagers often pay much attention to _________changes. (PHYSIC) 3. As a ____________businessman, he couldn’t imagine real poverty. (WEALTH) 4. Students should learn to be ___________ when making a class presentation. (CONFIDENCE) giúp mình vs ạ

Viết bài văn nghị luận giải thích : " Đi một ngày đàng , học một sàng khôn " . Nhanh nhanh ạ