giúp mk phần 3 la mã nha mk voie 5 sao nha

Bài 4. Tìm các số nguyên x sao cho: a) -7 là bội của x + 8 b) x – 2 là ước của 3x – 13

1) Tìm x € Z để biểu thức P = 2021 - 2│x-3│ đạt giá trị lớn nhất. 2) Cho biểu thức A = 5x - 2020/x - 50 . Tìm x nguyên để A có giá trị lớn nhất

Làm bài 1 và 2 mik cảm ơn nhiều

giải giúp mình với ạ. đề : điền ko quá 1 từ 1: road with signs in blue are usually to give .... 2 : when there are traffic ....., it takes me longer than 15 minutes to ride a bike to school 3: in spain, people who wear glasses have to carry a.... pair in the car. 4 :always look.... when you go .

X- Write a passage in 200 words about the beauty of your hometown ( Ưu tiên ai xong trước )

mn ơi giúp em câu này với ạ:mối quan hệ giữa tiêu hóa,tuần hoàn,hô hấp cân bằng nội môi trong cơ thể động vật .cảm ơn mn ạ

Bài 9. Hoàn thành các câu sau, cho dạng đúng của động từ trong ngoặc. 1. We (be) ____________ happy if air pollution were the only problem. 2. They would be disappointed if you (not go) _____________ to their party. 3. If we (use) _______ this kind of light bulb, we can save energy. 4. Peter should go to sleep early if he (not want) ____________ to be tired the next morning. 5. If you (take) _______________ more exercises, you would be more resistant to diseases. 6. You may have car accident unless you (drive) ________________ more carefully. 7. If I travel to London, I (visit) ____________ its museum. 8. If they offer me the job, I think I (accept) _________________ it. 9. Many people (be) ____________ out of work if the local factory closed down. 10. What (happen) _________________ if that red button was pressed? 11. I’d be absolutely astonished if Mary and James (get) _____________ married. 12. They won’t let you in unless you (show) _____________them your identity card. 13. My best friend gave me this book. She (be) ________________ very upset if I lost it. 14. Would you mind if I (turn) ________________ up the radio. 15. I’m sure she (forgive) ______________ you if you sincerely apologize to her. Bài 10. Đánh dấu ütrước câu đúng, đánh dấu x trước câu sai và viết lại cho đúng. ______ 1. Pollution can be reduced if we joined hands to prevent it. _________________________________________________________________ ______ 2. If farmers would make use of pesticide more wisely, the soil would not be poisoned. _________________________________________________________________ ______ 3. I won’t believe it unless you showed me the evidence. _________________________________________________________________ _____ 4. Unless you don’t tell me the truth, I won’t help you. _________________________________________________________________ _____ 5. If James is more outgoing, he would have more friends. _________________________________________________________________ _____ 6. I think the show would be successful if he were one of the organizers. _________________________________________________________________ ______ 7. If you paid more attention to what I said, you didn’t make so many mistakes. _________________________________________________________________ ______ 8. If children are taught about environmental issues, they might change their attitudes towards pollution. _________________________________________________________________ ______ 9. You would be punished if you park your car here. _________________________________________________________________ _____ 10. If you could win the competition, we will have a celebration. _________________________________________________________________ Bài 11. Hoàn thành các câu sau, chọn và cho dạng đúng của các độn từ cho sẵn. happen Reduce Save suffer Cause throw Take Be change See 1. If we use less vehicles, we _________ the amount of carbon dioxide into the air. 2. If you __________ the president, what you do to prevent air pollution. 3. If there were no fresh water left, what ____? 4. If people (not) ________________ rubbish in the street, it would look better. 5. if there wasn’t so much light in the cities at night, we __________ the starts more clearly. 6. If the water is contaminated, people ________ from many diseases. 7. If chemicals from factories are dumped into rivers and lakes, they ______ water pollution. 8. If people want to protect their planet, they should ________ their habit of using plastic bag for convenience. 9. If we recycle paper, we ________ 1000 trees a day. 10. If people were more aware of the negative consequences of pollution, they might ______ actions to prevent it. Làm hộ mình hết nha

một hình thang có diện tích 60 mét vuông , hiệu hai đáy 4 mét. hãy tính độ dài của mỗi đáy , biết nếu đáy lớn tăng thêm 2 mét thì diện tích hình thang sẽ tăng thêm.

ngày nay, để bổ sung khoáng sản năng lượng người ta sử dụng nguồn năng lượng gì? giúp mik vs mik cần gấp