Bài tập) Cho Δ ABC cân tại $ A $. Kẻ phân giác AD ( $ D ∈ $ BC). Trên tia đối của tia AB lấy điểm $ E $ sao cho AE $ = $ AB. Trên tia phân giác của ∠CAE lấy điểm F sao cho AF $ = $ BD. Chứng minh rằng: $ a $) AD $ ⊥ $ BC $ b $) AF // BC $ c $) EF = AD $ d $) Các điểm E, F, C thẳng hàng.

Giải nhanh hộ tui'-' Lm bài 1 ạ

Bài 2: Tìm x, biết a) l2x +3l=x +2 2 b) 3(x-2) +2/4=4 c) (x + 2)²: 9 = 9 d) (2x-1)^7=(2x-1)³

vẽ mầm NL: bạn nào giỏi toán thứ 4 mik nhờ 1 vc đc ko ạ

Calli: Try hard together NL: Chúc mừng nhóm tui đã hoàn thành cái đại đầu tiên trong sự nghiệp nha. Đặc biệt cảm ơn tv số 20 đã cày 51 câu cho nhóm (mọi ng rảnh thì vào vote cho bn í nha :3) ;-; Tui đứng top 8 :>>

Cho 3,87 gam hỗn hợp gồm Mg và Al tác dụng với 500ml dung dịch HCl. Nếu pứ trên làm thoát ra 4,368 lít khí $H_{2}$ ( đktc ). Hãy tính số gam Mg và Al đã dùng ban đầu?

Chuyển sang so sánh kép 20.you work hard, you will get good results. ->........................................................................................ 21.you learn with him much, you will know him well. ->....................................................................................... 22.many people live in this city, they need many services. ->............................................................................ 23.you do much exercises, you are fit. ->........................................................................................ 24.he wrote much, his writing becomes good. ->........................................................................................ 25.They use much wood pulp, they cut many trees. ->........................................................................................ 26.they travel much, they know about the world well. ->...................................................................................... 27.Jack eats much, he becomes fat. ->........................................................................................ 28.We start late, we get into many traffic jams. ->........................................................................................ 29.We breathe much polluted air, we will get weak. ->........................................................................................ 30.Means of transport are cheap, they become popular. ->................................................................................ 31.She studies hard, she gets a lot of good marks. ->........................................................................................ 32.you rest much, you will feel better. ->........................................................................................ 33.The weather is warmer, I feel better. ->........................................................................................ 34.We leave early, we will arrive soon. ->........................................................................................ 35.we have much knowledge, we become wise. ->........................................................................................ 36.you are young, you learn easily. ->........................................................................................ 37.the hotel is expensive, the services are good. ->........................................................................................ 38.you use much electricity, your bill will be high. ->........................................................................................ 39.I thought about the plan, I liked it little. ->........................................................................................ 40.He is old, he learns slowly. ->........................................................................................

AI giúp e giải với nêu A B C D E F G H dùm mik lun ạ

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KEEPING A COUNTRY CLEAN One problem that all the countries in the world have (3) ………….. common is litter. In (4) ………….. to get the situation under control in the UK, the government (5) ………….. a national spring cleaning day, which takes place every year on the first day of spring. The aim is to convey the message that local areas will be (6) ………….. places to work and live if people look after them. Ministers believe that chewing gum companies and fast food outlets are partly responsible for the problem and so they are hoping to persuade them (7) ………….. on the day. Studies carried out by the organisation “Keep Britain Tidy” have shown that more than half the population is guilty of (8) ………….. litter, leaving it to city councils to clean up the mess. Therefore, ………….. it is necessary (9) ………….. cash from fundamental areas, such as care of the elderly, to foot the bill. It has been calculated that more than £800 million every year is spent on cleaning city streets. The government hopes to change people’s behavior by making dropping litter (10) ………….. as unacceptable as illegal parking. 3. A. at B. for C. in D. on 4. A. a case B. an intention C. a trial D. an effort 5. A. had organised B. organised C. organises D. has organised 6. A. better B. more C. best D. much 7. A. helping B. to help C. help D. helped 8. A. drop B. dropping C. dropped D. to drop 9. A. diverting B. to divert C. divert D. diverted 10. A. even B. far C. just D. much