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B and C, but also D has the same result, but not correct expression.

Step-by-step explanation:

A) 1/2 year of ribbon. She cut it in 6 peaces, so it is :

(1/2)/6 not (1/2)/(1/6).

B) he use 1/6 of peper. He has 1/2 of paper, so it is (1/2)/(1/6). It is three. Its ok

C) (1/2)/(1/6) it is also true

D) 2 pound, so it is 2/(1/6) it is not true.

E) 6/2 which is equal like (1/2)/(1/6)

x equals 1

step-by-step explanation:

f(4)=f(×)

x=1

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,