Which of the following is not a correct statement or outcome for multiplying matrices?

a. In order to multiply matrices, number of columns in first matrix = number of rows in second matrix.
b. The matrix outcome is number of rows in first matrix by number of columns in second matrix.

  neither

Step-by-step explanation:

Both statements are correct.

If matrix 1 has dimensions (r1, c1) and matrix 2 has dimensions (r2, c2), their product can be formed if c1 = r2. The resulting product matrix will have dimensions (r1, c2).

4th option is correct xy=-10

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explanation:

remove parenthesis:

=

apply rule

=

multiply fractions:

=

=

divide:

=

mordancy.