Which score should I send?

I have a 35 composite on the ACT and a 1530 on the SAT. Is it necessary to send both scores? I was thinking about just sending my ACT scores

Sending the ACT 35 would be enough in most cases. If the school wants all score or you are going to submit SAT2 score, you don’t need to hide that SAT1 score. Nevertheless, if you happen to have a weaker section score in your ACT (which can be down to 30 in the most extreme scenario) and if that can be compensated by a high section score in SAT, then you should consider sending both. Schools do not superscore between the two test, but many schools do look at section scores separately. For instance, many engineering school would have a separated entry for the Math section score.

Thank you! @billcsho