San Francisco State and Sonoma State are other options as well, similar to what Gumbymom said.
OP, if you really want to go to SJSU for other reasons and you like math, I highly recommend to look into the ACM program (Applied and Computational Mathematics) as an alternative. It’s basically Math + CS, and the EI is 2900 iirc. I still think you should apply to CS as a first choice because college admissions seem random, but try to go to the best school for you where you got into CS directly.
Best wishes =)