What additional information would allow you to prove the quadrilateral is a parallelogram according to the minimum criteria?

What is the common difference in the following arithmetic sequence? 7,3,-1,-5

Thee blue triangle has rotated from quadrant i to quadrant iii about the origin. describe the effects of the rotation on the coordinates of the blue triangle.

Find the root(s) of f (x) = (x- 6)2(x + 2)2.