1. Congruent figures are exactly the same as each other.
3. Apply the translation, and then apply the dilation to your translation image.
7. The vertical transformation is y -> 2y + 1.
8. This transformation needs a reflection and a dilation.
18. Similar means exactly the same shape (even if the size is different).
20. Visualize making something bigger and then turning it, versus turning it and then making it bigger.