4 Select the correct answer. If the row echelon form of a system of three linear equations In three variables Is given by this matrix, which phrase describes the solutie OA one solution at the point (1,3,7) O B. Infinite number of solutions Oc. no solutions OD. one solution at the point (1,3,0) Reset Next 100

ts) Solve the following system of equations using any method (algebraic or matrix). Show all steps. Express all solutions as Fractions. NO DECIMALS. (2x + 3y +z = 7 x-2y+3z=5 (3x-y + 2z = 0 The solution is (x, y, z)=

1. Solve the system of equations by finding the reduced row echelon form for the augmented matrix. (Clearly specify each row operation that you use.) 2x + 3y -z = -1 x +y - z = 0 2y +3z -1

The reduced row echelon form of a system of linear equations in x and y or in x, y and z is given. For each system, determine whether it has a unique solution (in this case, find the solution), infinitely many solutions, or no solutions. 1. 10 0 4 0 1 0 -4 0 0 O A. Unique solution: x = 4, y = -4, z = 2 O B. Unique solution: x = 4, y = -4 O C. Unique solution: a = 4, y = -4, z = 0 O D. Infinitely many solutions O E. No solutions O F. None of the above