12598 rounded to the nearest thousands is 1260
Answer: C) 0
The lines are parallel. They never cross. To have a solution, the lines need to intersect. Each intersection is a solution. That's why there are no solutions here. The system is inconsistent.
Note how the slopes are both 1/2 while the y intercepts are different. Parallel lines have equal slopes but different y intercepts.
12.

13.

16.

is already in simplest form.
If the number line is drawn with the smaller number on the left and the larger number on the right, then
c. To the right of B