Question

X + 2y = 5

Answer 1

Answer:  The correct option is (C) 2.

Step-by-step explanation:  We are given to find the value of the y-determinant for the following system of linear equations :

$x+2y=5~~~~~~~~~~~~~~~~~~~~~~(i)\\\\x-3y=7~~~~~~~~~~~~~~~~~~~~~~(ii)$

The y-determinant for the above system is written as

$D(y)=\begin{vmatrix}1 & 5\\ 1 & 7\end{vmatrix}$

The value of the y-determinant will be

$D(y)=\begin{vmatrix}1 & 5\\ 1 & 7\end{vmatrix}=1\times7-1\times5=7-5=2.$.

Thus, the required value of the y-determinant is 2.

Option (C) is CORRECT.

Answer 2

B. 2
if any other number was in there i dont think it would work because its neg