Số biểu diễn số ô vuông của hình trên là:

A. 121

B. 122

C. 112

D. cả A, B, C đều sai

tớ giúp bạn:

x-y=8

y-z=10

x+z=12

cong 3 pt lại ta co: 2x-y+y-z+z = 30 => 2x=30

x=30:2=15

y=x-8=15-8=7

z=12-x = 12-15= -3

vay x+y+z = 15+7+(-3) = 19

This fruit has been in the fridge for over three weeks! It is all _______.

A. sour

B. mouldy

C. rotten

D. bitter

I don’t think anyone understood what I was saying at the meeting, did they? I totally failed to get my point _______.

A. around

B. along

C. across

D. about

For lunch, I always haave something quick and easy: a sandwich, a salad, toast and the _______.

A. same

B. similar

C. like

D. rest