help me................................... cmr : 4.x ².y ².z ² ≥(x ³+y ³+z ³+xyz)(x+y-z)(y+z-x)(z+x-y) ∀ x,y,z >0

e cần sớm trong hôm nay ạ . Mai e phải nộp rôì huhuhu 😭😭😭

Dear Jane, I'm sorry for not (31) to you for two months. In my postcard sent to you when I was on vacation in July, I told you about a new friend of (32) , Lisa Moran, who lives near my uncle's farm in Napan Valley, California. You may be curious to know what she is (33) . Well, Lisa is of our age - 17 - and not very tall or slim. In fact, she has (34) rounded shoulders and a plump face. The best (35) on Lisa's face are her green eyes and the two dimples on her checks. She (36) lively with her hair cut short and dressed in (37) clothes - jeans and a T-shirt. When I first met her at my cousin's birthday party, I was attracted by her (38) and pleasingly direct manners. Curiously enough, Lisa has the same (39) in music as you and I. That's (40) about Lisa for the moment. How have you been doing with your school work? Please write soon. Best wishes Ann Maxfield 31. a. write b. to write c. writing d. wrote 32. a. I b. me c. my d. mine 33. a. looking b. like c. seen d. similar 34. a. slightly b. hardly c. scarcely d. reasonably 35. a. aspects b. points c. features d. marks 36. a. feels b. seems c. appears d. looks 37. a. casual b. formal c. sports d. trendy 38. a. light-hearted b. high-handed c. self-centered d. easy-going 39. a. taste b. hearing c. sense d. way 40. a. all b. enough c. end d. most

X là 1 ∝ amino axit. CHo 100 ml dd X 0,3 M phản ứng vừa đủ vs 48ml dd NaOH 1,25M. Sau đó đem co cạn dd thu dc 5,31 gam muối khan . CTPT X là _____________________________ X là aminoaxit có dạng H2NRCOOH cho 15 gam X tác dụng vừa đủ vs dd NaOH ,co cạn dd sau phản ứng thu dc 19,4 gam muối khan . Tìm CTPT X _______________________________________________ Cho 3,75 gam 2 aminoaxit X tác dụng vừa hết vs dd NaOH thu dc 4,85 gam muối. Tìm CT X _____________________________________________________ aminoaxit X có dạng H2NRCOOH . CHo 0,1 mol X phản ứng hết vs dd HCL dư thu dc dd chưa 11,15 gam muối . Tên gọi của X là

1............ has become very popular with teenagers ,especially online games . 2.Helen fancies ..........with her friend at weekends . 3.He's usseless at ............ . He won't even put up shelf 4.Trang is fond of ........... . She made lots of beauriful bead bracelets and necklaces. 5.My sister is very good at ........... . She can fold paper into animals ,birds,flowers,etc.

Tìm cặp số nguyên tố (p,q) thỏa mãn p+q và p+4q là số chính phương.

CM: a)11+6√2=(3+√2)^2 b)(5-√3)^2=28-10√3 Tìm X: a)3√x=12 b)√1-2x+x^2=2x+1

Viết cali chữ '' Goodmoring '' nha mn nl: hónggggggggggggggggggggg

Giúp em với ạ. Toàn là trắc nghiệm thôi ạ 😢😢🙏 Đề câu 19: Cách viết nào sau đây là đúng? Đáp án có trong ảnh ạ.....🥺🥺🥺

James is ______ judo in the playground with his friends and he is very excited. * having playing doing studying Keep quiet! Jessica ______ a headache so she is sleeping in her bedroom. * studies plays does has My father is ______ a cup of coffee with his colleague in the living room now * doing playing having study Williams always ______ breakfast with bread, egg and milk before coming to school. * studies plays has does Tiffany and Rosy usually help their mom ______ the chores at the weekend. * have do play study She usually ______ English vocabulary every morning. * doing having studies plays My brother ______ basketball with his friends three times a week * does plays has studies I have Math lessons --------- Monday and Friday. * at between from on Mai brushes _____ teeth every morning. * her my she his Mai _____dressed at six thirty every morning * lives does gets brushes My father is an _________. He works in a big factory. * doctor engineer farmer teacher chọn hộ mình đáp án đúng :]]