Cho $A={1;2;3;4;5}$. Từ tập $A$ lập được bao nhiêu số có $5$ chữ số đôi một khác nhau và chữ số $1$ luôn đứng trước chữ số $2$

Cali:Nhóm ưi, cố lên! Yc:Trang trí thêm vài vựa muối xung quanh😆 Nl:Bình luận

Hiện nay tổng số tuổi của hai mẹ con bằng 40 tuổi . Biết rằng 2 năm trước tuổi mẹ gấp 11 lần tuổi con. Tính tuổi mẹ , tuổi con hiện nay.

giúp mình vs ạ,mình hứa sẽ vote 5 sao

a) (x+1)^3 = -125 b) 3^4-x = 27 c) (x+1,5)^8 +(2,7-y)^10 = 0 d) 3^-1. 4^x = 5/3.2^7 e) 9^-x . 27^x = 243

I. Find which word does not belong to each group. 1. A. run B. can C. will D. could 2. A. hate B. enjoy C. like D. love 3. A. waste B. useful C. helpful D. careful 4. A. noisy B. costly C. useful D. expensive 5. A. activities B. emotion C. thinking D. felling

Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. 11. A. hates B. works C. stops D. lives 12. A. school B. child C. cheese D. church Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions. 13. A. recent B. suggest C. apply D. divide 14. A. expensive B. official C. impossible D. beautiful

Calli "Diệp Tư" Có bg + trang trí

x^2+4xy+4y^2+x^3+2x^2y phân tích đa thức thành nhân tử

giúp mik với , mik cần gấp trong vòng 15p nữa . hứa sẽ vote đầy đủ X Fill the blanks with correct preposition 1We were very grateful_______ our friends ------------ all of their assistance. 2 Her parents are very pleased_________ her French. 3 I’m bit short_________ money. Can you lend me some? 4 I was delighted___________ the present you gave me. 5 Mr. Green is responsible ____hiring employees. 6 The plane took ________ very quickly. 7 Anne’s leaving ________ London tomorrow morning. 8 This cake is made ______ flour, eggs, milk, salt and button 9 Nam should work harder ____his English pronunciation 10 A final search _____ evidence at the scene of the crime proved fruitless. 11 These yoghurts are free _______ artificial coloring. 12 The well-known businessman was sentenced ______ three years in jail for fraud. 13 We have spent a fortune ______ our new house, but I think it was worth it. 14 The difference ______ price for the same product can vary considerably from the store to store. 15 the travel book will be useful ________ our trip to Paris at the end of the month. 16 This brochure will be useful ________ all the tourists who visit the sights. 17. While looking for a reference book, I came _____ an old letter from my friend 15 years ago. 18 The match kicked _______ at 5 and has not finished. A. at B. off C. on D. in