1) x(5 – 2x) + 2x(x – 1) = 15. 2) (8 – 5x)(x + 2) + 4(x – 2)(x + 1) + 2(x – 2)(x + 2) = 0. 3) 2(5x – 8) + 3(x2 – 5) = x(3x – 4) + 11.

Mng giúp mình với ạ. Mình cám ơn nhiều lắm á Jack started having driving lesson three or four weeks ago(learning) ->

mình cần gấp ,bạn nào giúp mình với,ai tl nhanh+ đúng mình vote 5 sao TT

Các b. Giải cho mình câu 2 và 3,4 đi mà

Điện phân (với điện cực trơ, cường độ dòng điện không đổi) dung dịch chứa 17 gam muối M(NO3)n trong thời gian t, thấy khối lượng dung dịch giảm 9,28 gam và tại catot chỉ có a gam kim loại M bám vào. Sau thời gian 2t, khối lượng dung dịch giảm đi 12,14 gam và tại catot thấy thoát ra 0,672 lít khí (đktc). Vậy giá trị của a là A. 6,40. B. 8,64. C. 2,24. D. 6,48.

Thực hiện phép tính 3/2x+(3x-3)/(2x-1)+(2x^2+1)/(4x^2-2x)

bài kiểm tra kì lạ của tác giả nào

Các bro giúp tui nhá Visual pollution has a greater effect on people than you may think. I remember when I went to a big city, I was really scared because so much graffiti on the buildings' wall. Then I looked up, and I saw a lot of power lines over my head. Although they were not dangerous, I still felt unsafe since I thought they might fall down. These things prevented me from enjoying the beautiful sights of the city. I also remember the time when I was a student at a university. Once I was so busy with my assignments that I did not tidy my room for two weeks. Looking at the messy room caused me so much stress that I did not want to study. Then I decided to clean the room and put my thing in their proper places. I also bought a small plants and placed it in a corner of the room. These simple actions increased my motivation and helped me to focus on my learning. Questions. 1.How did the author feel when she saw the power lines? …………………………………………………………………………………… ……………. 2.Why did she have that feeling? …………………………………………………………………………………… ……………… 3. What was she busy with? …………………………………………………………………………………… ……………… 4. What happened when she looked the messy room? …………………………………………………………………………………… ……………… 5. What did she do for her room?Visual pollution has a greater effect on people than you may think. I remember when I went to a big city, I was really scared because so much graffiti on the buildings' wall. Then I looked up, and I saw a lot of power lines over my head. Although they were not dangerous, I still felt unsafe since I thought they might fall down. These things prevented me from enjoying the beautiful sights of the city. I also remember the time when I was a student at a university. Once I was so busy with my assignments that I did not tidy my room for two weeks. Looking at the messy room caused me so much stress that I did not want to study. Then I decided to clean the room and put my thing in their proper places. I also bought a small plants and placed it in a corner of the room. These simple actions increased my motivation and helped me to focus on my learning. Questions. 1.How did the author feel when she saw the power lines? …………………………………………………………………………………… ……………. 2.Why did she have that feeling? …………………………………………………………………………………… ……………… 3. What was she busy with? …………………………………………………………………………………… ……………… 4. What happened when she looked the messy room? …………………………………………………………………………………… ……………… 5. What did she do for her room?

Quangcuong347 giúp e với Cho 25 gam dd muối Kali halogenua phản ứng vừa đủ với 12ml dd AgNO3 1M, thu được 2,82 gam kết tủa. a, Xác định nguyên tố halogen b,Tính nồng độ phần trăm của dd muối Kali halogenua đã dùng

Cho tam giác ABC có AB = 6cm, AC = 9cm.Các điểm D E theo thứ tự thuộc các cạnh AB AC sao cho BD=4cm CE=6cm a,Chứng minh tam giác ADE đồng đạng tam giác ABC và xác định tỉ số đồng dạng b,Kẻ EK//AB.Chứng minh tam giác ADE đồng đạng tam giác EKC