Beginner Gardening: What to cut back after blooming?, 1 by amacgillivray

amacgillivray wrote:
We bought a property that has many perennial flowers on it, and I know very little about their care. Quite a few things have finished blooming, or will soon. I don't know if I can attach more than one picture, but as 3 examples of larger plants, there is
- a yellow flower about 4' high that vaguely resembles a teddy bear sunflower
- another 4' high with large yarrow-like flowers (but leaves not as finely dissected) and
- a rose about 6' high with a large but quite simple (almost wild) shape of bloom. Several stems look dead.

Should I be cutting them back to the ground or just cutting off flowers or ?
By the way, if you know what they are from picture(s) I'm interested in that as well.