Question

Will give brainliest !!

Answer 1

Answer:

$[B]=2$

Step-by-step explanation:

$B=\left[\begin{array}{ccc}3x-5&-3+2y\\11-3x&2y-5\end{array}\right]$

With $x=3$ and $y=4$

$B=\left[\begin{array}{ccc}3(3)-5&-3+2(4)\\11-3(3)&2(4)-5\end{array}\right]$

$B=\left[\begin{array}{ccc}9-5&-3+8\\11-9&8-5\end{array}\right]$

$B=\left[\begin{array}{ccc}4&5\\2&3\end{array}\right]$

solving the determinant of matrix B

$[B]=\left[\begin{array}{ccc}4&5\\2&3\end{array}\right]=(4.3-5.2)=(12-10)=2$

Answer 2

I think the answer is (B)=2(B)=2 Im not 100% sure though.