Linear Algebra is definitely one you can make use of. When I studied it at uni I did it from a mathematical standpoint and only some years later discovered how

Linear Algebra is definitely one you can make use of. When I studied it at uni I did it from a mathematical standpoint and only some years later discovered how useful it is in computing. Have you done any study of Graph Theory? I've found that a surprisingly large number of problems in computing can be morphed into graphs. I was working on an issue last week (in a web app) that turned out to be a variant of Exact Cover which straight away gave me a large body of literature / algorithms to pull from - and told me I was in a slightly dark place :). Graphs and the algorithms around them feel very close to the work we do with computers, so it will probably be pretty approachable given your background. My advice would be to not worry too much about how applicable it will be to web development and just pick something to study. Ultimately, it will end up being useful in time. And maths is just beautiful.