I have a lot of birds at my feeder some look like a mix of sparrow and cardinal a finch and sparrow am i righ?

We would have no way to know what is coming to your feeder without seeing a picture. But if you are asking if it's possible for a Sparrow and a Cardinal or a Finch and a Cardinal or a Sparrow and a Finch, to mate and produce offspring, no, that is not possible. Species do not interbreed that way.