viết bài văn hoàn chỉnh kể về ngày tiết quê em ở

a)2*(x+1)-3*(x-2) = x-4 b)3*(4-x)-2*(x-1)=x+20 C)3*(x-2)+2x=10 d) Tìm x,y biết 3x+4y-xy=15

You must come with us. It’s ______________ market in the world!

giúp mk bài 6 vs ak mk cảm ơn trước nha

Đạo hàm là gì? Giải thích rõ dùm

với khai báo biến mảng Var a:array[1..50] of real ,các phần tử trong mảng có thể nhận giá trị nào sau đây: A 1.0E3 B 1.0D2 C 1.0A1 D 1.0C1

1.Trang ____ me 20 minutes ago. A. phones  B. phoned  C. had phoned         D. has phoning  2.Because Lan _________ breakfast, she isn’t hungry now A. was eating B. eats C. ate D. has eaten 3.I___ (not / understand) what they were talking about. A. did not understand B. not understand C. do not understand D. does not understand  4.They _________ maried for 22 years A. have got B. have been C. was D. got * 5. _________ flown in an aeroplane before? A. Have you ever B. Had you ever C. Are you D. Do you * 6.When I phoned my friends, they (play) ________ cards. A. played B. were played C. were playing D. was played * 7.She is ……………….. old to work. A. very B. too C. so D.such * 8. Would you be ………………….. kind as to tell me the time? A. so B. very C. too D.such

Mng hộ mik vs làm bài 3 và bài 4 nhé!

nhanh ctlhn 5sao cảm ơn 3h m nộp r nha

Hàm số là sao ạ. Em hơi dỡ toán