Cho ∆ABC vuông tại B . Gọi D là trung điểm của cạnh AC . Trên tia đối của tia DB lấy điểm E sao cho DB = DE . Chứng minh : a, ∆ABD = ∆CDE b, góc AEC là góc vuông

Rewrite the following sentences without changing the meaning, using the word given 23 Because I have a lot to do outdoors, I have no time to watch TV. (so) Complete each of the following sentences with the words or phrases given 24 What / time / you / go / gym / yesterday / ? Rearrange the following words and punctuation marks to complete the sentences. 25 your eyes/ swimming/ should/ when/ goggles/ you/ you/ go/ wear/ to protect. cả bài này nữa

Cho a,b,c>0 và P=$\frac{a}{a+b}$ +$\frac{b}{b+c}$ +$\frac{c}{c+a}$ .Khi đó. A.1<P<2 B.P>$\frac{3}{2}$ C. 0<P<1 D.2<P<3

Bài 8:Tính hợp lý nhất: b) –23 . 63 + 23 . 21 –58 . 23 a/ 210 + [46 + (–210) + (–26)] b) (–8)–[(–5) + 8]; c) 25.134 + 25.(–34) Bài 9:Tìm sốnguyên x biết: a)3x –27 = 9 b)2x + 12 = 3.(x –7) c)2x2–1 = 49 d)x + (–35)= 18 e)2x –(–17) = 25 f)3x –65 = –7 –13

tìm các số nguyên n để a) 3-n là ước của n+2 b) 5n+6 là bội của n-3

Choose the best answer to fill in the blank. 5 We use a ________ to change the channels from a distance. A. TV schedule B. volume button C. remote control D. newspaper 6 The program can both ________ and entertain young audiences. A. education B. educational C. educate D. educated 7 The mother told her son: “________swim in the lake. It's very dangerous." A. Do B. can't C. Don't D. Not swim 8 Peter________ three goals for our team and made it a hat trick. A. scores B. plays C. scored D. played 9 ________ do you do judo? - Twice a week. A. When B. Why C. Where D. How often 10 Team sports are sometimes called________ sports. A. competition B. competitor C. competitive D. compete 11 He likes playing basketball________ it is so funny. A. although B. but C. so D. because 12 He________ out with his friends last week. A. went B. go C. goes D. going 13 My father likes watching TV________ he spends most of his time in the evening watching his favourite programmes. A. because B. and C. but D. so 14 Please________ up, we are going to be late for school again. A. to hurry B. hurries C. hurry D. hurrying Identify the mistake in each sentence 15 Minh enjoys to play volleyball in his free time. A B C D 16 How often do you watch “Thanks God you are here”? One a week A B C D 17 He is going to take an umbrella but it is raining heavily outside. A B C D Choose true, false or no information. On Saturday, Patricia was in the park when she saw a boy on a mountain bike. He was on the hill when suddenly he fell off his bike. Patricia ran over to help. ‘Where’s my helmet?’ he shouted. It was under a park bench so Patricia went to get it. Just then another boy ran past, took the boy’s mountain bike and rode away. ‘Stop!’ Patricia shouted. She ran ager the other boy and stopped him. He got off the bike and ran away. Patricia took the bike back to the boy. ‘Thank you, Patricia’, he said. ‘How do you know my name?’ Patricia asked. ‘I live next to you’, he said. ‘My name’s Tom’. On Sunday Tom left some flowers on her doorstep to say ‘thank you’. 18 Patricia was in the street when she saw a boy on a mountain bike. A. False B. True 19 The boy fell off his bike. A. True B. False 20 Another boy rode away with his helmet. A. False B. True 21 Patricia stopped the other boy and took the bike back. A. True B. False 22 Tom gave Patricia a CD to say ‘thank you’. A. False B. True giúp mình nhanh với nhé mình chỉ có 30' thôi

Các bạn giúp mình với. Mình hứa sẽ vote 5 sao cho các bạn

giúp mình bài 4 nhaaa cảm ơn nhiều nhiều á🥰

1 máy biến thế có số vòng cuộn sơ cấp là 1000 vòng , số vòng cuộn thứ cấp là 2000 vòng. Đặt vào 2 đầu cuộn sơ cấp máy biến thế 1 chiều 12V . Hỏi hiệu điện thế lấy ra ở 2 đầu cuộn thứ cấp là bao nhiêu?

Sắp xếp theo thứ tự tăng dần: 35, -24, /-78/, 90, 0, -145