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.