More than good enough. Even the cambridge prospectus says, essential: maths and physics, highly desirable: a third maths, science or technology subject.
So I'd say with goos results in those subjects you could apply to any of the best unis. I know it's early to be thinking about uni applications, but you could even link Performing arts to confidence building/public speaking in your personal statement, as communication and giving presentations are becoming increasingly important in business and industry nowadays.