In the brackets, the first number
refers to x, and the second to y (like when you write coordinates).
So
we can check what is y ineach of the options and compare whether both of the sided of the equasion are equal: A. 2x-5=-1, should be 11, false B.
2x-5=4-9=-5, should be 1, false C. 2x-5=2-5=-3, should be -3, correct D.
2x-5=10-5=5, should be -5, false
The polygon that when rotated at 180 degrees about it's center may not be carried onto itself is a quadrilateral. The reason being quadrilateral is not regular in the sense that different sides have different measures.
