A dilation would produce a similar figure. Therefore, the sequence of transformations that will produce a similar but not congruent figures would be the first and the third option. Figure TUVWX is dilated by a scale factor of 6 and then rotated 90° counterclockwise around the origin; and figure TUVWX is reflected across the x-axis and dilated by a scale factor of 7. Hope this answers your question.
