Một ô tô phải đi quãng đường AB dài 120 km với thời gian đã định. ở nửa đầu đoạn đường, ô tô đã đi với vận tốc lớn hơn vận tốc dự định là 5 km/ h và ở nửa đoạn đường sau ô tô đã đi với vận tốc kém vận tốc dự định là 4 km/ h biết ô tô đến B đúng thời gian dự định. Hỏi thời gian ô tô dự định đi quãng đường AB?
Women in this area do not bear many children any more. Chuyển đổi câu nhưng ko đổi nghĩa. Giúp mình với
Giúp em với ạ em hứa vote 5 sao mà
1/ x.(15x-5)=0 2/ (6x-24).(24x+18)=0 3/ x²-7x=0 4/ 7x²-21x=0 5/(x-1)²-81=0
Giải giùm mik câu 10 mik vote 5 sao với câu trả hay nhất cho
Giúp e với ạ e đang cần gấp ai làm hộ em vote 5sao ạ
Tỉ lệ thức là gì? Phát biểu tính chất cơ bản của tỉ lệ thức. Viết công thức để thể hiện tính chất của dãy tỉ số bằng nhau.
tìm x 1)|x-5|=12 2)|3x-12|=x+2
kiểm tra xem đúng ko giúp mik Read the paragraph and answer the questions : Lan’s mother is a teacher. She teaches math at a high school. She works eighteen hours a week. She also has a lot of work to do at home such as making paper, preparing for the new lessons etc… She cooks very well. She also plays badminton in her free time. Questions : a.What does Lan’s mother do ? =>Lan’s mother is a teacher. b.Where does she work ? =>She teaches math at a high school. c.How many hours a week does she work ? =>She works eighteen hours a week. d.Does she do a lot of work at home ? =>She also has a lot of work to do at home such as making paper, preparing for the new lessons etc… e.What does she do in her free time ? =>She also plays badminton in her free time. B.WRITNG I. Supply the correct form of the verbs in the brackets 1. Hoa (have) has a lot of friends in Hue 2. Nam and Trang always (visit) visit their grandparents on Sundays. 3. My father (listen) listens to the radio every morning. 4. The children (like) like with her parents 5. She (not live) doesn’t live with her parents. II..Complete the second sentence so that it has the same meaning as the first one : 1. Why don’t we go to the beach ?. à What about going to the beach ? 2. Nam will visit his parents tonight . àNam is going visit his parents tonight. 3. Tim’s father has more vacations than Hoa’s father. àHoa’s father has fewer more vacations than Tim’s Father 4. We will have a vacation that lasts for three months. àWe will have a three months summer vacation 5. He likes to drink tea after meals. à He enjoys drinking tea after meals III. Put the words into the correct order to make sentences : 1. where / you / is / show / the / could / me / bank ? => where you show me could is the bank? 2. mail / some / need / overseas / stamps / I / for . => I need some stamps for overseas 3. she / to / like / buy / would / postcards / some . => Would she like buy some phone card 4. take / how long / it / to / Ha Noi / does / get / to / plane / by ? => how long does it take to get ha noi by plane
Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct word/phrase that best fits each of the numbered blank from 23 to 27. Sociologists have been carrying out research into the social pressures of being a teenager. Many adolescents are unhappy at school because they find it difficult to (23)______ friends. This stress can bring on illness or result in poor grades. They may also worry about their appearance and often feel (24)______ enormous pressure to dress, talk and behave the same as (25)_____. This phenomenon is called peer pressure, and it is very common in today’s society. Advertising contributes a lot to the social pressures teenagers feel. Advertisers know how important it is to feel that you belong to a group when you are in your teens, so they try to persuade teenagers that certain products will make them (26)______ with their classmates. Sadly, many teenagers act irresponsibly and even do dangerous things just to make others accept them. Peer pressure is often the reason for teenage smoking, drug (27)______ or dangerous driving. Teenagers need to learn to say “no” to social pressure and to find friends who they can talk things over with when they have a problem. 23. A. keep B. create C. remain D. make 24. A. in B. under C. over D. below 25. A. another B. the other C. others D. other 26. A. common B. popular C. open D. favorite 27. A. overdose B. abuse C. addicted D. overuse
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