Does Your normal mmr affect ranked mmr?

I know mmr is like a hidden ranking that matches you up with similar players of your ranking, and recently, I've been playing a lot with my friend who's gold. I was wondering, does this raise my mmr only in normals, or does it apply to ranked as well? In the future, if I play a normal game solo, would I be matched with people in a higher elo than i am?
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