Tính pH của các dung dịch Ba(OH)2 0,2M

Bài 1: phân tích đa thứ thành nhân tử a) ( x - 12 )(x + 7 ) - 2x + 14 b) x2 - 6x + 8 c) 9x2 + 9xy - ( x + y ) d) ( x2 - 2xy + y2 ) - 81 e) ( x + 4 )2 - 15 ( 4 - x) Bài 2: a) 2x (x - 2019 ) - x + 2019 = 0 b) x^3 - 25x = 0 c) ( x + 2 )^2 - 4 ( x + 2 ) = 0

IV. Put in a phrasal verb that means the same as the verb in brackets. Use the correct form of the phrasal verb. Rachel : I've (1) .......................... (discovered) what the problem is with the exam. Vicky : Oh. Good. Tell me. Rachel : When they printed the papers, they (2) (omitted) a page. No one noticed until the papers had all been (3) ........................... (distributed). Now they'll have to (4) ....................... (discard) all the papers and (5) ...................... (postpone) the exam. Vicky Are you sure you haven't (6) .............................. (invent) this whole story? Rachel : It's true, I tell you. And isn't it good news? Vicky : I don't know about that. It means we'll have to (7) ............................. (continue) revising.

Cho hình thang ABCD (AB\\CD), M là trung điểm của AD, N là trung điểm của BC. Gọi I,K Theo thứ tự là giao điểm của MN với BD,AC. Cho biết AB=6cm,CD=14cm. Tính độ dài MI,IK,KN.

Giúp mình mai mình phải gửi gấp

I.Choose the word which has the underlined part pronounced differently from that of the rest(phần gạch chân mình viết in hoa ạ) 1.A.drEAd B.thrEAd C.brEAd D.bEAd 2.A.switCH B.catCH C.matCh D.aChe 3.A.Group B.dialoGue C.huG D.Gender 4.A.nUrsery B.nUclear C.pUrchase D.sUrface 5.A.plumBer B.celeBrate C.descriBe D.aBrupt II.Choose the word whose main stress is placed differently from the others 1.A.curriculum B.repetitious C.historical D.grammatical 2. A. psychological B. representative C. qualification D. popularity 3. A. scenic B. extreme C. official D. renewable 4. A. alcohol B. equator C. chemical D. comfortable 5. A. compliment B. effective C. charity D. activity (giải chi tiết các bước hộ mình ạ :3)

Giải thik giúp mik vs 3. My new teacher explained the lessons ______more clearly _______ than my old teacher. (clear) 4. He doesn’t play volleyball as _____well________ as his brother. (good) 5. Get rid of the sorrow! You will do it ____better_________ next time. (good) 6. Communication is a lot ___easier__________ than it was 50 years ago. (easy) 7. People in rural areas wear ______more simply _______ than those in cities. (simple) 8. Robert arrived at the meeting _____later ________ than Francis. (late) 9. These trousers are too wide. Do you have any that are ___narrower__________? (narrow) 10. My mother always gets up _______earier______ than everybody else in the house. (early) 11. Rene speaks _____fluently________ than the other ESL students in the class. (fluent) 12. Can’t you think of anything _____more intelligent ________ to say? (intelligent) 13. I think his new book is much ________more boring_____ than his last one. (boring) 14. Max finished the homework ______faster_______ than anyone else in the class. (fast)

mọi người giúp em với câu này em kh hiểu

write a short question of your own each of the interrogative pronouns below .then write a sentence that answers the question ( làm ý tưởng độc đáo hay sẽ được vote ) - who ,whose ,what ,which ,who 1........................................................ 2.......................................................... 3.......................................................... 4..................................................... 5.............................................................

14.Our houses will use the sun or the wind ____ electricity. A.to have B.to do C.to make D.to give 15.In the future, cars might use energy from ____. * A.gas B.water C.oil D.power 16.Our dream house will be located ____ the sea. * A.on B.at C.in D.between 17.Don't ____ old things because perhaps you will need them later. * A.throw B.throw away C.throwing D.throwing away