The augmented matrix below represents a system of equations.

Option 2

Explanation:

<--> symbol means you must interchange (swap) Row 1 and Row 2. This means you must switch the two rows where row 1 (-1 1 2 | 7) takes place of row 2 (-3 2 1 | 4) and vice versa.

martin luther believed that selling indulgences was wrong and gave people a license to sin. the roman catholic church used the practice of indulgences to raise money for major building projects.

england is crowded cold and polluted while north america was like the opposite