Wildflowers: Yellow Coneflower and Black-Eyed Susan

I'm not a flower expert, but I think the yellow wildflowers that we've seen abundantly all around at the sides of the roads (the top two pictures below) are not Black-Eyed Susans, but Yellow Coneflowers. I think the third picture below is a Black-Eyed Susan (it's growing in Grams' garden). If you know a lot about wildflowers, I'd love to hear what you think!!