If A is a 5 x 7 matrix with rank 3, which one of the

Last updated: 7/8/2022

If A is a 5 x 7 matrix with rank 3, which one of the following statements is true: A) The column space of A has dimension 2. B) The row space of A has dimension 4. C) The null space of A has dimension 4. D) Ax = 0 has only the trivial solution. E) A-¹ can be written as a multiplication of elementary matrices.