Number 2 looks like it could be white cinquefoil, need to see more of the plant, if those strawberry looking leaves belong to the flowers, i would be fairly certain. Number 3 looks like it could be smartweed, if true, it will have a spike of purplish small flowers. If these guesses are correct, they are edible and medical, as most weeds are. Number one does look like nettle, but it would be much easier to tell when it blooms, or if you touch it.
This may also be the appropriate time to mention the differences between eatable and edible. In other words, one could eat many barks to survive, but would make a terrible meal. And with all plants, especially foraged, roll a small amount in your mouth and wait. Swallow spit from chewed plant, wait. Consume small amount, wait. When one eats the lesser known edibles and eatables, its hard to tell what your reaction will be to a foreign plant.
There are many Smartweed species, but I've never seen any with fuzzy stems, although some species may have a small number of hairs, but not on the stems. Also, all Smartweeds always have swollen nodes on the stems and #3 doesn't have that.
#3 could be Horseweed or a Fleabane of some type, which often do have hairy stems.
Companion Planting Guide by World Permaculture Association