Cho hình bình hành ABCD có BC=2AB.Gọi M,N là trung điểm BC,AD a) cm MNDC là hình bình hành b) Kẻ DE vuông góc AB tại E,DE cắt MN tại F cm F là trung điểm DE c) cm góc ABC=2 góc BEM Làm hộ mik vs ạ

Câu 3: Tổng số hạt proton, notron và electron trong một nguyên tử X là 28 hạt, trong đó số hạt không mang điện chiếm khoảng 35%. Xác định số lượng mỗi loại hạt trong nguyên tử X.

Giúp dùm em với ạ 🥲 Em đang cần gấp ạ!!!

Tìm a, b, c ,d biết: a.b.c.d = 2;3;4;5 với a+b+c+d = -42

Làm hộ mình câu c d với ạ . Mình cảm ơn rất nhiều

b) qua A kẻ đường vuông góc với EF, cắt BC ở I. Chứng minh I là trung điểm BC. (Vẽ hình giúp em) anh chị nào rủ lòng thương giải gấp giúp em được không ạ!!! sáng mai em phải nộp gấp rồi!!!! em cảm ơn!!!!!!!!!!!

Ex9.Read the passage and answer the questions below. Van Phuc Silk Village is situated on the banks of Nhue Thi River, Nguyen Trai Road, near Ha Dong city, 8 km southwest of Ha Noi. It takes you only 30 minutes by motorbike to go there from the centre of Hanoi. The village has been much well -known for its traditional sericulture, weaving, and silk products. Tourists coming here are lured by various beautiful shirts, crafts, ties, dresses and many other things made of silk available in the village. What is special is that the silk is made by very simple looms, which is the genuinely traditional Vietnamese way of making silk.For centuries, silk has always been considered an extreme luxury, compared with rhinoceros horn, ivory and precious handworks in Vietnam. It has long been a universal byword of luxury, often worn by the richest, most powerful citizens. Today, the fine and lustrous cloth that originates from the cocoon of the silkworm is more affordable for “ordinary” folk. Furthermore, silk is currently enjoying a fashion renaissance, particularly since its many varieties can be made into a wide range of designs suitable for all facets of modern life. With 2000 years of history behind them, the silk weavers of Van Phuc Silk village are still busy weaving dreams. 1. How old is Bat Trang pottery village? 2.What do many youngsters and foreign tourists like to do when they visit Bat Trang pottery village? 3. Where is Van Phuc Silk Village situated? 4. What is Van Phuc Silk village famous for? 5. What is special about Van Phuc silk?

Rút gọn: a,(a+b)^3+(a-b)^3-2a^2(a+1) b,(2x-1)^3-(2x+1)^3-5x(x-3) c,(x+2)^3+(x-2)^3-2x(x^2+12) d,(2a+3b)^3-(2a-3b)^3+3(2a-b)(2a+b)

Giúp mik với ạ mik đang cần gấp làm từ câu 4

Help me I: Cho dạng đúng của động từ trong ngoặc:Dùng to hoặc ving 1. I'd rather (stay) home tonight. 2. He keeps (hope) and (pray) that things will get better. 3. I don't know why he avoids (meet) me. 4. The boy admitted (break) my ancient flower vase. 5. I promise (not tell) you a lie. 6. The students stopped (talk) when the teacher came in. 7. I'll try (not make) the same mistake again. 8. Would you mind (give) me a hand? 9. Have you ever watched people (try) (catch) fish? 10. Do you have any money (pay) for the book? 11. After (hear) the conditions, I decided (not enter) for the competition. 12. Imagine (get) up at 4 a.m every day. 13. There were some people (row) on the river. 14. Your hair needs (cut) You'd better (have) it done tomorrow – unless you'd like me (have) it for you. 15. The children prefer (watch) TV to (read) 16. She has something (tell) you. 17. It took me three days (find) out the old photograph. 18. Do you remember (read) about it? No, at that time I was too young (read) newspaper. 19. My brother is a stamp collector. He started (collect) stamps when he was 15 years old. 20. It's difficult (get) used to getting up early