50 điểm đó không cần kẻ hình làm phần c thôi hứa trả đủ ạ

cho hình vuông abcd, tìm ảnh của hình vuông qua tâm O, góc quay 90độ nhanh jup mk ạ!!

viết pthh thôi nha vướng mỗi phần đấy:)))))

cách tính có số có mũ là `-1` (đừng kêu bấm máy)

Cmr : 36n ² + 60n + 24 chia hết cho 24 ( n là số nguyên )

1,tìmGTNN a, A= x ²-2x+y ²-7y+9 b, B=x ²+2y ²-4x-8y+2xy+13 c, C= (x-1)(x+2)(x+3)(x+6)

V. Complete each of the sentences using one suitable word fromthe box. assured promised complained empathized congratulated apologized offered admitted suggested encouraged

Giúp mik vs m ng owiiiiii hứa votes 5*

Tìm số nguyên tử hoặc phân tử: a) 1,5 mol nguyên tử Mg b) 5 mol nguyên tử An c) 1,5 mol phân tử HCL d)2,5 mol phân tử MgCL2

V. Change the following sentences into Negative (-) and Questions (?) 1. My hobby is making paper dolls. _________________________________________________________ ______________________________________________________________________________________ 2. The paper dolls are always drawn on cardboard and cut out. ______________________________________________________________________________________ ______________________________________________________________________________________ 3. He usually runs every morning. ___________________________________________________________ ______________________________________________________________________________________ 4. She seldom watches TV at weekends_______________________________________________________ ______________________________________________________________________________________ 5. Nam likes doing things outside ___________________________________________________________ ______________________________________________________________________________________ 6. Those girls have over thirty dolls. _________________________________________________________ ______________________________________________________________________________________ 7. The boy often hangs out with his best friend. ________________________________________________ ______________________________________________________________________________________ 8. Mary enjoys making paper dolls __________________________________________________________ ______________________________________________________________________________________ 9. It‟s raining outside _____________________________________________________________________ ______________________________________________________________________________________10. They often ride a horse. ________________________________________________________________