A student performed row operations on a matrix as shown below. -4
1 2
4
4
-4
1
2
4
-1 3
1
→
0
-1 3
1
3
4
4
5
3
0
107
N
Which operations did the student perform?
2R2+ R3 R3
2R3+-R3 R3
2R2+R3 R2,R3
2R2 R3

Which equation represents the partial sum of the geometric series?

What is the measure of angle z in this figure? enter your answer in the box. z = ° two intersection lines. all four angles formed by the intersecting lines are labeled. clockwise, the angles are labeled 43 degrees, x degrees, y degrees, and z degrees.

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?