(1 point) Solve the system using row operations (or elementary matrices). -2x +by = 52 7x -4y = -47 X= -19/35 V = 54/5(1 point) On the augmented matrix A below , perform all three row operations in the order given, ((2) followed by (b) followed by (0)) and then write the resulting augmented matrix. 1 3 6 2 A = 3 8 6 4 3 5 2 3 (a)R2 = 3r1 + 1'2 (b)R3 = 371 + r3 (C)R3 = 4r2 + r3 Note: You can earn partial credit on this problem. Preview My Answers Submit Answers reduced rowechelon form: How many solutions are there to this system? 0 A. None 0 B. Exactly 1 O C. Exactly 2 O D. Exactly 3 O E. Infinitely many 0 F. None of the above If there is one solution, give its coordinates in the answer spaces below. If there are infinitely many solutions, enter 2 in the answer blank for z, enter a formula for y in terms of z in the answer blank for y and enter a formula for x in terms of z in the answer blank for x. If there are no solutions, leave the answer blanks for x, y and 2 empty. (1 point) Solve the system by finding the reduced row-echelon form of the augmented matrix. x+2y+4z =1 3x4y 10z = 3 x2z =5 reduced row-echelon form: How many solutions are there to this system? Q A. None 0 B. Exactly 1 O C. Exactly 2 O D. Exactly 3 O E. Infinitely many 0 E None of the above