The matrix below is in echelon form. x y z u 1 0 0 0 0 1 7 7 Write the corresponding linear system. :8:3 equation 1 y + z + u = equation 2 x + y + u = Solve the linear system. (Enter your answers as a comma-separated list. If there are infinitely many solutions, enter a parametric solution using t and s as the parameters. If there is no solution, enter NONE.) (x, y, z, u) = (

Determine the value(s) of k such that the system of linear equations has the indicated number of solutions. (Enter your answers as a comma-separated list.) No solution x + ky = 5 kx + y = 2 k=

Please circle the answer so that I know which section the answer belongs to. If possible, number the answers. Your last reply was excellent, I understand. I appreciate you.

Determine the distance between the point ( 2,-3,1) and the point of intersection of the following system. 3x - 4 z = 4 -x+ 2y + 3z = 7 3+ 3y 4 42 = 12