The ornamental design for an adjustabletable, as shown and described.
FIG. 1 is a perspective view of the top, front and left side of the
adjustable table in accordance with the invention and in an intermediate
unlockable locked position;
FIG. 2 is a perspective view of the top, rear and left side thereof; and,
FIG. 3 is a perspective view of the bottom, front and right side thereof.