Question

Write the matrix form for linear equations: $3x+4y=54x+5y=9$

• A. $\left[\begin{array}{cc}3& 4\\ 4& 5\end{array}\right]\times \left[\begin{array}{c}x\\ y\end{array}\right]=\left[\begin{array}{c}5\\ 9\end{array}\right]$
• B. $\left[\begin{array}{cc}3& 4\\ 4& 5\end{array}\right]\times \left[\begin{array}{c}y\\ x\end{array}\right]=\left[\begin{array}{c}5\\ 9\end{array}\right]$
• C. $\left[\begin{array}{cc}4& 3\\ 5& 4\end{array}\right]\times \left[\begin{array}{c}x\\ y\end{array}\right]=\left[\begin{array}{c}5\\ 9\end{array}\right]$
• D. $\left[\begin{array}{cc}4& 5\\ 3& 4\end{array}\right]\times \left[\begin{array}{c}x\\ y\end{array}\right]=\left[\begin{array}{c}5\\ 9\end{array}\right]$

Answer 1

The correct option is A $\left[\begin{array}{cc}3& 4\\ 4& 5\end{array}\right]\times \left[\begin{array}{c}x\\ y\end{array}\right]=\left[\begin{array}{c}5\\ 9\end{array}\right]$

The matrix for the linear equation:
$3x+4y=54x+5y=9$

$\left[\begin{array}{cc}3& 4\\ 4& 5\end{array}\right]\times \left[\begin{array}{c}x\\ y\end{array}\right]=\left[\begin{array}{c}5\\ 9\end{array}\right]$