75% cua 100 la :

     75 x 100 : 100 = 75

                  Dap so : 75

show khoe ảnh chụp nghiêng ko ạ ? ko phải ảnh mạng , ko idol ,... . tóm lại là của bản thân hay là bạn bè j cx đc ạ . rảnh quá , xin lỗi nếu làm phiền :))

Trong không gian với hệ toạ độ Oxyz, cho ba điểm A(1;0;0),B(0;2;0),C(0;0;3). Mặt phẳng qua hai điểm B,C và tâm mặt cầu nội tiếp tứ diện OABC là ax+by+cz-6=0. Giá trị của biểu thức a+b+c bằng

A. -4.

B. -18.

C. 4.

D. 18.

The activities of the international marketing researcher are frequently much broader than _____

A. the domestic marketer has

B. the domestic marketer does

C. those of the domestic marketer

D. that which has the domestic marketer

15 cm

tích dúng cho mình nha1

Đạo hàm của hàm số  y = x . x 2 - 2 x là

A. y ' = 2 x - 2 x 2 - 2 x

B. y ' = 3 x 2 - 4 x 2 - 2 x

C. y ' = 2 x 2 - 3 x x 2 - 2 x

D. y ' = 2 x 2 - 2 x - 1 x 2 - 2 x

Question. We arrived at the conference. Then we realized that our reports were still at home

A. No sooner had we realized that our reports were at home than we arrived at the conference.

B. Only after we arrived at the conference did we realize that our reports were still at home.

C. Not until we arrived at the conference that we realized that our reports were still at home.

D. Hardly had we arrived at the conference that we realized that our reports were still at home.