-7x-11 chia hết cho 2x+4

giúp mik vs mik đang cần gấp

tính tổng sau

A=1²-2²+3²-4²+....+99²-100²+101²

Biến đổi vế trái thành vế phải

a(b-c)-b(a+c)=(a+b)(-c)

Would you like……………that for you ?

What is the ............of that river?

A. long B. wide C. length D. heavy

Thu and Nga help their mother ....................... the house work after school.

A- to B- from C- with D- at

What time _____________ on television?

A. is the news B. are the news C. is news D. are news

I am very tired. - ___________.

A. Me too B. for me the same C. Also me D. I also

Don’t be late __________ your school.

A. on B. at C. to D. for

. I don’t want much butter in my coffee. Just _______ please.

A. little B. a little C. few D. a few

. Fall means ........................ in Bristish English.

A. Summer B. Winter C. Autumn D. Spring