School is like the most important thing to build a good future.
Sort of, some things yes, other things no.
Unless you're going to be a mathmetician, you most likely won't need to be able to solve X5+Y>MX+B assuming that's how to find the line of a slope? I never have been great at math, anyway, there are some subjects that are indeed important in life though.
EDIT: Y=MX+B That was it.