State the elementary row operations applied to the first augmented matrix A to transform it to its row-equivalent matrix B.

Question

A =

1	−2	7
6	4	1

B =

1	−2	7
0	16	−41

A: 2R₂ + R₁

B: 5R₂ - 15R₁

C: (-6)R₁ + R₂

D: Interchange R₁ and R₂

E: None of these

Answer 1

Note that Row 1 stays the same and is still 1 -2 7. You are just using it modify Row 2. The final matrix then is: