Types of Matrices

Find the value of $x$ and $y$ that satisfies the equations $\left[\begin{array}{cc}3& -2\\ 3& 0\\ 2& 4\end{array}\right]\left[\begin{array}{cc}y& y\\ x& x\end{array}\right]=\left[\begin{array}{cc}3& 3\\ 3y& 3y\\ 10& 10\end{array}\right]$

The value of $x+y$ from the following equation is $2\left(\begin{array}{c}1\\ 0\end{array}\begin{array}{c}3\\ x\end{array}\right)+\left(\begin{array}{c}y\\ 1\end{array}\begin{array}{c}0\\ 2\end{array}\right)=\left(\begin{array}{c}5\\ 1\end{array}\begin{array}{c}6\\ 8\end{array}\right)$.

Wihch of the following is a diagonal matrix.

Which of the following is a diagonal matrix.

Wihch of the following is a diagonal matrix.

Identify scalar matrix from the following matrices.

The order of the following row matrix $M=\left[\begin{array}{cc}\begin{array}{ccc}\begin{array}{ccc}a& b& c\end{array}& d& e\end{array}& f\end{array}\right]$ is $1\times 5$.

Which of the following represents a column matrix? 

The matrix $\left[\begin{array}{l}a\\ b\\ c\\ d\end{array}\right]$ represents a column matrix.

The matrix $\left[\begin{array}{lll}0& 0& 0\\ 0& 0& 0\\ 0& 0& 0\end{array}\right]$ represents a zero matrix.

If $A=\left[\begin{array}{llll}0& 5& 7& 9\\ 8& 1& 4& 6\\ 6& 7& 2& 9\\ 4& 4& 8& 3\end{array}\right]$, then find the number of diagonal elements of square matrix.

The matrix $A=\left[\begin{array}{ccc}10& 0& 0\\ 0& 10& 0\\ 0& 0& 10\end{array}\right]$ is scalar matrix.

The matrix $A=\left[\begin{array}{ccc}\sqrt{5}& 0& 0\\ 0& \sqrt{2}& 0\\ 0& 0& \sqrt{5}\end{array}\right]$ is scalar matrix.

The matrix $A=\left[\begin{array}{ccc}-7& 0& 0\\ 0& -7& 0\\ 0& 0& -7\end{array}\right]$ is