Cho hệ phương trình $\left \{ {{2x-3y=2√m+6} \atop {x-y=√m+2}} \right.$ (m là tham số) a) Giải hệ phương trình với m=4. b) Tìm các giá trị của m sao cho biểu thức P=x+y đạt giá trị nhỏ nhất.

Hậu quả của chính sách bóc lột của nhà hán đối với nhân dân giao châu là gì

văn nghị luận ngắn chứng minh câu " gần mực thì đen, gần đèn thì rạng giúp mik nha ko sao chép

Change these sentences into the passive voice using the words given: 1/ They are building a new bridge at the moment.  A new bridge ......................... 2/ Somebody has taken away some of my books.  Some of my books ................... 3/ The chief engineer was instructing all the workers how to use the machines. All the workers ............................................................................... 4/ They can't make tea with cold water.  Tea ..................................................... 5/ They will hold the meeting before May Day.  The meeting ............................... 6/ They have to repair the engine of the car.  The engine ....................................... 7/ People spend a lot of money on advertising every year. A lot ........................... 8/ The boys broke the windows and took away some pictures.  The window ........ 9/ They may use this room for the classroom.  This room...................................... 10/ Our teacher is going to tell a story.  A story ................................................... 11/ Mary is cutting the cake with a sharp knife.  The cake ................................... 12/ The children looked at the woman with a red hat.  The woman........................ 13/ You mustn't use this machine after 5.30.  This machine .................................. 14/ Luckily for me, they didn't call my name.  Luckily for me,..............................

Cần những người muốn đua top nèkkkk Đề Bà Minh có 3 530 000d với tổng cong có 74 to tiển gồm 3 loại: loại 20 000d, loại 50 000d và loại 100 000d. Hội mỗi loại có mấy tờ biết rằng số tờ tiền loại 20 000d gấp đôi sổ tờ tiễn loại 100 000d.

Nêu nội dung của khổ 6 của bài thơ bếp lửa

1. Eight years ago we started writing to each other. A. We have rarely written to each other for eight years. B. Eight years is a long time for us to write to each other. C. We wrote to each other eight years ago. D. We have been writing to each other for eight years. 2. The boy was so lazy that he couldn't stay up late to learn his lessons. A. The boy was lazy enough not to stay up late to learn his lessons. B. The boy was too lazy to stay up late to learn his lessons. C. The boy was lazy enough but he stayed up late to learn his lessons. D. The boy was lazy enough to stay up late to learn his lessons. 3. My father is tired of seeing any violent films. A. My father hasn't seen a violent film. B. My father has enjoyed all the violent films he has ever seen. C. My father is worried about missing the next violent film. D. My father never wants to see another violent film. 4. As soon as he waved his hand, she turned away. A. He saw her turn away and he waved his hand. B. No sooner had he waved his hand than she turned away. C. She turned away because he waved his hand too early. D. Although she turned away, he waved his hand. 5. John wishes he had remembered to send Mary a Christmas card. A. John regrets not to send Mary a Christmas card. B. John regrets forgetting not to send Mary a Christmas card. C. John regrets not remembering sending Mary a Christmas card. D. John regrets forgetting to send Mary a Christmas card. 6. My father hasn't smoked cigarettes for a month. A. It's a month since my father last smoked cigarettes. B. It's a month ago that my father smoked cigarettes. C. It's a month that my father hasn't smoked cigarettes. D. It's a cigarette that my father smoked a month ago. 7. Having finished their work, the workers expected to be paid. A. The workers expected to be paid because they had finished their work. B. Having their work finishing, the workers expected to be paid. C. Having expected to be paid, the workers finished their work. D. Having been finished their work, the workers expected to be paid. 8. Mr. Brown bought this car five years ago. A. Mr. Brown started to buy this car for five years. B. It has been five years when Mr. Brown has bought this car. C. Mr. Brown has had this car for five years . D. It is five years ago since Mr. Brown has bought this car. 9. John used to write home once a week when he was abroad. A. John doesn't write home once a week any longer. B. John enjoyed being written home every week when he was abroad. C. John never forgot to write a weekly letter home when he was abroad. D. When he was abroad he remembered to write home every week. 10. I haven't enjoyed myself so much for years. A. It's years since I enjoyed myself so much. B. It's years since I have enjoyed myself so much. C. It was years since I had enjoyed myself so much. D. It has been years since I have enjoyed myself so much.

Ai giải pt này giúp mik vs ạ 60/x-3-60/x=1

giải các pt sau với a,b,c là tham số ( GẤP Ạ) a)$\frac{a+b-x}{c}$+ $\frac{b+c-x}{a}$ +$\frac{c+a-x}{b}$+ $\frac{4x}{a+b+c}$ =1 b)$\frac{1}{2}$ ($\frac{x-a}{bc}$+ $\frac{x-b}{ca}$ +$\frac{x-c}{ab}$)= $\frac{1}{a}$+ $\frac{1}{b}$ +$\frac{1}{c}$

Cuộc khởi nghĩa của các quý tộc Trần có ý nghĩa gì