In Exercises 1-6, determine the size of the matrix. [1 30 2 -4 1 -4 6 2] [1 2 -1 -2] [2 -6 -1 2 -1 0 1 1] [-1] [3 2 1 1 6 1 1 -1 4 -7 -1 2 1 4 2 0 3 1 1 0] [1 2 3 4 -10] In Exercises 7-10, identify the elementary row operation(s) being performed to obtain the new equivalent matrix. [-2 3 5 -1 1 -8] [13 3 0 -1 -39 -8] [3 -4 -1 3 -4 7] [3 5 -1 0 -4 -5] [0 -1 4 -1 3 -5 -5 -7 1 5 6 3] [-1 0 0 3 -1 7 -7 -5 -27 6 5 -27] [-1 2 5 -2 -5 4 3 1 -7 -2 -7 6] [-1 0 0 -2 -9 -6 3 7 8 -2 -11 -4] In Exercises 11-18, find the solution of the system of linear equation represented by the augmented matrix. [1 0 0 1 0 2] [1 0 0 1 2 3] [1 0 0 -1 1 0 0 -2 1 3 1 -1] [1 0 0 2 0 0 1 1 0 0 -1 0] [2 1 0 1 -1 1 -1 1 2 3 0 1] [2 1 1 1 -2 0 1 1 1 0 -2 0] [1 0 0 0 2 1 0 0 0 2 1 0 1 1 2 1 3 3 1 4] [1 0 0 0 2 1 0 0 0 3 1 0 1 0 2 0 3 1 0 2] In Exercises 15-24, determine whether the matrix is in row- from, if it is the, determine whether it is also in reduced row- forms. [1 0 0 0 1 0 0 1 0 0 2 0] [0 1 1 0 0 2 0 1] [2 0 0 0 -1 0 1 1 0 3 4 1] [1 0 0 0 1 0 2 3 1 1 4 0] [0 0 0 0 0 0 1 0 0 0 1 2 0 0 0] [1 0 0 0 0 0 0 0 0 0 1 0] In Exercises 25-38, solve the system using either Gaussian elimination with back-substitution or Gauss-Jordan elimination. x + 2y = 7 2x + y = 8 -x + 2y = 1.5 2x - 4y = 3 2x - y = -0.1 3x + 2y = 1.6 -3x + 5y = -22 3x + 4y = 4 4x - 8y = 32 x + 2y = 0 x + y = 6 3x - 2y = 8 2x + 6y = 16 -2x - 6y = -16