Giúp em với ạ :(( em cảm ơn nhiều

Trên một đường gấp khúc tạo thành một tam giác đều ABC có hai xe khởi hành cùng lúc từ A. Xe 1 chuyển động theo hướng AB với vận tốc không đổi 3m/s, xe 2 chuyển động theo hướng AC với vận tốc không đổi 2m/s. Mỗi xe chạy 5 vòng. Hãy xác định số lần gặp nhau, vị trí và thời điểm gặp nhau của 2 xe ( không kể những lần gặp ở A)

B={x|x là số tự nhiên chẵn ,40<x<50}

Calli: Chịu. NL: ai trả lời dùm mình câu hỏi trong hình của 1 bạn ;-; chứ mình chịu.

Cho A = Căn x + 9 / căn x + 3. Tìm các giá trị nguyên để A lớn bằng 2 . Giúp mk vss,..................

giúp mik bài này nhanh nhanh với mik đang cần gấp

mn giúp mik mik đag cần gấp thanks các bạn

Vẽ anime/chibi/mầm. NL: Tôi là con heo béo ú, ảo tưởng nhất. Đừng quan tâm dòng trên Thứ nghiệp Nhớ mặt t đấy

Sục từu từ khí so2 đén dư vào dd br2 coa màu vàng,hiện tượng xảy ra là gì

I. Rewrite each sentence or question so it has the same meaning 1. Although Tom was a poor student, he studied very well. =In spite of 2. Mary could not go to school because she was sick. =Because of 3. Although the weather was bad, she went to school on time. =Despite 4. My mother told me to go to school although I was sick. =In spite of 5. Because there was a big storm, I stayed at home. =Because of 6. Tom was admitted to the university although his grades were bad. =Despite 7. Although she has a physical handicap, she has become a successful woman. =Despite 8. In spite of his good salary, Tom gave up his job. =Although 9. Though he had not finished the paper, he went to sleep. =In spite of 10. In spite of the high prices, my daughter insists on going to the movies. =Even though I Give the correct form of the word given to complete the sentence. 1. Is she_enough to run one kilometer? (GOOD) 2. “Ow! Be careful with that coffee." - “Look, now I have a_(BURNING) _on my arm” 3. Rob has a of 39.5°C(TEMPERATE) 4. Don't eat so quickly. You'll get a(TEETH) 5. I have a_ in my back. I'm going to lie down.(PAINFUL) 6. That's a bad__. Why don't you have a glass of water? (COUGHING) 7. “I have _ _.” - “Why don't you telephone the doctor?” (STOMACH) 8. My arm _after the table tennis match(HURT) 9. "I have a.” - "That's because you watch too (HEAD) much TV.” 10. Lan was absent from class because of her(SICK) 11. I have an - with my doctor at 5p.m.(APPOINT) 12. She is still receiving a__treatment in a hospital. (MEDICINE) 13. People fellwhen they catch a common cold. (PLEASE) 14. She's to seafood. So when she eats them, she will (ALLERGY) have stomachache problems. 15. You should choose foods and drinks to prevent (CARE) some dangerous diseases. 16. He continues _because he is catching a flu.(SNEEZE) 17. He can reduce his serious when he relaxes in time and (DEPRESS) does exercise regularly. 18. If you provide yourself with enough vitamins, you will make (CONCENTRATE) a better on your work or study. 19. I got _during my beach vacation.(SUNBURN) 20. Lack of vitamin E can cause skin diseases and(TIRED) 1. Put the verbs in brackets in the correct tense form . 1. Nam looks brown. He was on holiday last week. He (get). .sunburn 2. Getting plenty of rest is very good. It (help)......... ...you to avoid depression, 3. The Japanese (eat)...........a lot of fish so they are very intelligent. 4. If you wash your hands more, you (have)................. less chance of catching flu. 5. Eating carrots regularly (help).......you see better. 6. It is very hot outside. Please (wear).....................a sun hat when you go out. 7. Do more exercise and you (feel).....healthier. 8. I don't want (be)..... tired tomorrow so I go to bed early . 9. Nowadays, I don't feel well. I often (feel)............................sick and weak. 10. People who (smile).... more are happier and they live longer. II. Put the verbs in brackets in the correct tense form . 1. It is important (eat) well . 2. It (be)_ _very cold today. You should wear your warm clothes when you (go)out to prevent cold 3. Do morning exercise every day and you'll(feel better. 4. I have a lot of homework to do this evening, so I (not have) time to watch the football match . 5. (Eat) dunk food and inactivity (be) the main causes of obesity . 6. I (have)__a headache and I need to rest more . 7. I (have) a toothache so I have to/ seethe dentist. 8. I have to take medicines because I (be) sick. 9. Japanese (eat) more fish instead of meat, so they (stay) more healthy