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sweet [91]
3 years ago
14

Which is the correct coefficient matrix for this system?

Mathematics
1 answer:
BlackZzzverrR [31]3 years ago
4 0

We have been given a system of equations and we are asked to write correct coefficient matrix for this system.

Since we know that a matrix for a system of equations is in the form: AX=B, where A represents the coefficient matrix, X is variables''s matrix and B is the constant matrix.          

We are given two equation and two unknown variables, so our coefficient matrix will be a 2\times2 matrix. Our matrices for variable and constant will be of dimensions 2\times1 (column matrix).

We can represent our given system of equations in matrix form as:

\left[\begin{array}{ccc}3&4\\-1&-6\end{array}\right] \left[\begin{array}{ccc}x\\y\end{array}\right]= \left[\begin{array}{ccc}12\\10\end{array}\right]

Now let us find our A, X and B parts from above matrices.

A=\left[\begin{array}{ccc}3&4\\-1&-6\end{array}\right]

X=\left[\begin{array}{ccc}x\\y\end{array}\right]

B=\left[\begin{array}{ccc}12\\10\end{array}\right]

Since we know that A represents coefficient matrix, therefore, correct coefficient matrix for our system of equations will be,

\left[\begin{array}{ccc}3&4\\-1&-6\end{array}\right]


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