To solve this problelm you must apply the proccedure shown below:
1. You have that tan M=tan D=7/15 and the triangle DAD is dilated by a scale factor of two.
2. When the triangle DAD is translated, it keeps the same shape.
3. Therefore, when it is dilated by the scale factor, you obtain:
tan D=(7x2/5x2)
tan D=14/30
4. So, as you can see, the answer is the first option: 14/30.
