Bài1 a) Một hình hộp chữ nhật có kích thước là 5cm;8cm;7cm.Tính thể tích của hình hộp chữ nhật đó b)Tính diện tích xung quang của hình chóp tứ giác đều,biết trung đoạn có độ dài bằng 5cm và mặt đáy có diện tích 36cm^2 Bài 2:Giải các phương trình sau: a)4x-150=-x+50 b)x/x-1-2x/1-x^2=0 c)5-|x-12|=2x d)(x^2+x)^2+4(x^2+x)=12 Bài 3:Giải các phương trình sau: a )x+5>0 b)x+3/5<5-x/3 Bài 4:Một ôtô đi từ A đến B trong một thời gian dự định,Nếu ôtô chạy với vận tốc 40km/h thì đến B chậm hơn 30 phút so với thời gian dự định.Nếu ôtô chạy với vận tốc 50 km/h thì đến B sớm hơn 24 phút so với thời gian dự định.Tính quãng đường AB Bài 5:Cho tam giác nhọn ABC,trên AC lấy điểm M sao cho góc ABM=góc ACB.Từ A kẻ AH vuông góc với BC(H thuộc BC) và kẻ Ak vuông góc với BM( K thuộc BM) a)Chứng minh rằng tam giác ABM~tam giác ACB b)Biết Ab=2cm,Ac=4cm.Tính AM c)Chứng minh:AB.AK=AM.AH

Các câu hỏi liên quan

1:chosses the word whose underlined part is pronounced differently from that of the other words in each group 1a) viewed b) acted c)filmed d)starred 2a) hand b)transport c)character d)celebration` 2:chosse the word that has a different stress pattern from the others 3a)traffic b)agree c)noisy d)ostudent 4a)listen b)frighten c)answer d)obey 3:chosse the best answer by circling A,B.C,D 1)......being frightened by the images,lan still liked the film so much. a)in spite b)despite c)although d)neverheless 2)...... is La Tomatina celebrated?-Every August a)where b) why c) when d)which 3) my father like the.......of that singer a)perform b) performer c) performance d)performing 4)Lan user to......morning exercise when she got up early a)did b)does c)doing d)do 5)my father........the bus to work everyday,but i cycle a)catches b)drives c)goes d) runs 6)you should look ringt anh left when you go.....the road a)down b)across c)up d)along 7)the end of the film was so..... a)moved b)moving c)move d)moveable 8)i...go on foot when i was in primary school a) have to b)may c)can d)used to 3:use the correct form of words 1) We (watch)......TV yesterday 2) I (do)......my homework tomorrow 3) do you know what the.....(celebrate)is for? 4) Turkey is one of the.... (tradition)foods at Thanksgiving is the US 4:reading comprehension visit the Edinburgh Festival every year,thousands of people come to Edinburgh,the capital city of Scotland,to be part of the edinburgh Festival.For three weeks every August and September the city is filled with actors and artist from all over the world.they come to Edinburgh for the biggest arts festival in Britain.During this time,the streets of the city are alive with music and dance from early in the morning until late at night.You can even see artists painting picture on the streets! Ten thousands of tourists come to the festival to see new film and plays and to hear music played more than forty countries the tickets for these performances are quite cheap,and it is usually easier to see your favourite star in Edinburgh than it is London.So come to Edinburgh next summer 1.why do thousands of people come to edinburgh every year? 2.is edinrgh the capital of scotland? 3.how are the streets of the city during this time? 4.are the tickets for these performances expensive or cheap? 5:Đặt câu hỏi với từ trong ngoặc 1)I bought this T-shir for my brother (in Sydney) 2)We always have (turkey)on Thankgiving 3)Peter went to Da Nang last month with(his parents) 4)They wear googles (to protect their eyes) 6: rewrite the sentences,so that their mesning stay the same,using the beginning 1) What is the distance between Quang Ngai and HCM city? How....................................... 2)Although the sky was dark,they were working in the field despite.................................................