A similarity transformation is one or more rigid transformations (reflection, rotation, translation) followed by a dilation. When a figure is transformed by a similarity transformation, an image is created that is similar to the original figure.
The correct answer is 42.
5 • 8 = 40
40 + 2 = 42
20x^2+50 = -40x^2+110x [ Taking x as the unknown positive integer ]