Question

Choose which of the following are true statements about matrices. (2 points). ( ) A matrix with 14 elements is impossible. ( ) If two rows are identical in a matrix then there are infinitely many solutions. ( ) A 3-by-2 matrix and a 2-by-3 matrix have the same number of elements. ( ) An acceptable row operation is to switch columns.

Answer 1

The answer is If two rows are identical in a matrix then there are infinitely many solutions And A 3-by-2 matrix and a 2-by-3 matrix have the same number of elements. Hope this wasn't too late

Answer 2

The correct answers are:

If two rows are identical in a matrix then there are infinitely many solutions.; and A 3-by-2 matrix and a 2-by-3 matrix have the same number of elements.

Step-by-step explanation:

If two rows or columns in a matrix are identical then the determinant is zero. If the determinant of a matrix is 0, then the system of equations have infinitely many solutions.

A 3-by-2 matrix has 3(2) = 6 elements. A 2-by-3 matrix has 2(3) = 6 elements as well.