Làm thế nào biết được dân số, nguồn lao động ở một địa phương, một quốc gia?

Câu 5. Một người đi xe đạp chậm dần đều trên một dốc dài 100 m, vận tốc ở chân dốc là 36 km/h, ở đỉnh dốc là 18 km/h. Sau khi lên được nửa dốc thì vận tốc xe là bao nhiêu? Còn bao lâu nữa thì xe lên đến đỉnh dốc?

Giúp e vs ạ e cần gấp e sẽ cho5*

Giúp vs cần gấp Cho Tam giác ABC vuông tại A ( A<90độ ) ;Bt BC=24cm;AC=2cm.Từ A kẻ Đường thẳng Vuông góc vs AC cắt CB tại E.Kẻ đường cao AH của Tam Giác ABC a)Tính AH b)Tính CE;BE;AE

Viết đoạn văn (khoảng 10 câu) ghi lại kỉ niệm sâu sắc nhất của em trong ngày đầu tiên đi học, giúp mik với, gợi ý đây

vẽ mầm sướng nl:phê~~~~~~~~~~~~~~~~~~~~~~~~~~```

Phân tích đa thức thành nhân tử a. $x^{4}-2$ . $(a^{2}$ +$b^{2}$).$x^{2}$+ $(a^{2}$ - $b^{2}$ )$^{2}$ b. $(ab+1)^{}$ . $(a+1)^{}$ . $(b+1)^{}$ + $ab^{}$

Tôi.muốn trợ giúp hai bài toán này

siêu dài siêu khó!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

giải nhanh giúp mình với 5h nộp rồi thanks nha các bạn 1. The college _____________ students for a career in business. (prepare) 2. No athlete would dream of entering a big race without adequate ______________. (preparation) 3. The questions ____________ into two categories: easy and hard. (divide) 4. We need to ensure a fair _______________ of time and resources. (divide) 5. There is an _____________ number of boys and girls in the class. (equal) 6. We need to ensure _____________ of opportunity in all areas of work. (equal) 7. Gender and racial _____________ are still widespread throughout society. (equal) 8. She was disappointed because she felt _____________ to the task she was given. (equal) 9. Women were often treated _____________ in the past. (equal) 10. Everyone in this house is happy because they share the housework _____________. (equal) 11. Cooking is a hugely important part of French _____________. (culture) 12. Teachers need to be aware of _____________ differences. (culture) 13. We are _____________ to announce the engagement of our daughter. (happy) 14. She gets married to the prince and they all lived _____________ ever after. (happy) 15. Their grandchildren are a constant source of _____________. (happy) 16. I didn't realize but he was deeply _____________ at that time. (happy) 17. Her lazy husband was causing her deep _____________. (happy) 18. I was feeling very _____________, so I didn’t go to the party. (society) 19. These children have grown up to be useful and productive members of _____________. (society) 20. She has a busy _____________ life. (society) 21. She's a _____________ child who'll talk to anyone. (society) 22. It's time for someone to take _____________ and get the job done. (responsible) 23. Even when parents no longer live together, they each continue to be _____________ for their children. (responsible) 24. Would you like to _____________ to our collection? (contribute) 25. All _____________ will be gratefully received. (contribute) 26. Some parents are highly _____________ of the school. (criticize) 27. You should live a healthy and _____________ life. (criticize) 28. His _____________ towards her was becoming more and more aggressive. (behave) 29. We are very _____________ to all those who contributed. (gratefulness) 30. She is considered _____________ because she does not take good care of her parents. (gratefulness)