Bạn anh có 7 quả bóng, trong đó số bóng xanh nhiều hơn số bóng đỏ, số bóng đỏ nhiều hơn số bóng vàng. Hỏi bạn anh có mỗi loại mấy quả bóng?

Tìm m, n, p (m, n thuộcN* ; p thuộcQ) sao cho:(-2x8y5)(-4x3y7)=(Pxny3)(-7x2ym)

giúp e vs đi mấy ace I . Fill in each blank with one suitable from the box to complete the passage: (1,5ms) Acid rain will not be an easy problem to solve .As more and more countries become …(1)… there will be more and more competition for petroleum for cars, home heating and industry . While ….(2)….petroleum contribute greatly to acid rain, it is less polluted than coal. Unfortunately, petroleum is more ..(3)…than coal and no one knows exactly ..(4) … petroleum is left. Therefore, there will be a pressure to burn coal for energy. Coal is a lot dirtier energy source than petroleum. Since we already know how …(5).. acid rain is, it is important ..(6)… we increase our efforts to find a non-pollutingsource of energy as quickly as possible, so that we can avoid further environmental damage. 1. A. industry B. industrial C. industrialize D. industrialized 2. A. firing B. shooting C. burning D. cooking 3. A. expensive B. cheap C. clean D. dirty 4. A. how many B. how much C. how far D. how long 5.A. destroy B. destroyed C. destruction D. destructive 6. A. that B. if C. weather D. which

làm hộ mình vs ạ,mình cảm ơn (mai nộp rồi)

Lập bảng nêu nội dung của các hiệp ước 1883 và 1884(giống và khác nhau)

khát vọng chính đáng của người nghệ sĩ trong bài thơ hầu trời của tản đà

Trong khung thời gian có hạn, khi viết đoạn văn Nghị luận xã hội, học sinh nên chọn hình thức diễn đạt (kiểu trình bày) nào là tối ưu nhất ? Giúp mình câu này với ạ

1. Emergency teams are still clearing up the __________ from the plane crash. A.debris B.dust C.pieceD.waste 2. Thousands of buildings and houses were completely destroyed when the earthquake __________ the city. A. fought B. struck C. happened D. arrived 3. The Maori in New Zealand greet each other by __________ their noses. A.punching B.touching C.blowing D.shaking 4 .If you __________ the president, what would you do to help the environment ? A.are B.had been C.were D.was 5. Singapore is famous for its __________ and green trees. A. cleanliness B. cleanly C. cleaning D. clean 6. Air___________, together with littering, is causing many problems in our cities today. A. pollute B. pollution C. polluting D. polluted 7. If we ______________ water carefully, more people will have fresh water. A. will use B. would use C. using D. use 8. A severe tropical___________ is called a typhoon. A. drought B. rain C. flood D. storm 9. Have you taken notice …..the “stop” sign. A. at B. of C. to D. from 10.The Statue of Liberty is a major monument in New York which ……..freedom A. attracts B. symbolises C. decide D. understand

x+1 4 1-x ___ - ____ = ____ x-1 x²-1 x+1

giúp cam khoanh bua, khoanh bua spam