Which system of equations has exactly one solution?
0
2x-4y= 8
x+y=7
o
3x+y=-1
6x+2y=-2
3x+3y=3
-6x-6y=3
3x-2y=4
-3x+2y=4

12. decide whether each statement is always true, sometimes true, or never true. a. when corresponding points of an original figure and its reflection are connected, the resulting segments are all perpendicular to the line of reflection. b. when a point is reflected over a horizontal line, the y-coordinate of the point stays the same. answer both questions and explain

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤

What is the the greatest common factor ?