for the maths part, ask what all the kids in your lowest maths class are doing and study that, you get given formulas.
if i could go back to year 10 i would not have bothered studying at all. SC means nothing, your in school assesment would be more important. Its pretty much a basic skills test. If you want to do well, it would only be for bragging rights. My tip, relax, chill, forget about homework etc, just enjoy yr 10 and its opportunity to bludge.