I am in high school and I an failing at maths.I have tried a tudor but that did not work and I am beginning to think that there is nothing else to do and I might fail maths all throughout high school.

Why didn't the tutor work out?

Change your mindset. If you start believing that you don't have the ability to understand math, you are defeated before you begin.
You just haven't taken the time and made the effort to learn the rules I think. Math is an exercise in precision. The answer you arrive at is either right or wrong and if you don't follow the rules, it won't work.
Try another tutor. Some are talented, many are not.