What is the arithmetic mean between -7 and -25?

The vertices of a rectangle are given in the columns of the matrix . if is found to perform a transformation, what are the coordinates of the transformed rectangle? (0, 0), (0, –3), (–3, –3), (–3, 0) (0, 0), (0, 3), (3, 3), (3, 0) (0, 0), (0, 3), (–3, –3), (–3, 0) (0, 0), (0, 3), (–3, 3), (–3, 0)

When only separate discreet points are graphed it is called?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles