Chemistry help & maths help (high school level)

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I'm currently on a Science GCSE course at college (evening classes, I failed at school) and the module we're doing at the moment is Chemistry.
I'm really struggling with it and the module is almost over and it'll never be touched upon again with the teacher.

There's also Maths GCSE I'm starting to struggle with. We're doing direct and inverse proportion right now. I can get the answer on the easy ones, but I don't actually know how to show my working out. The method they're trying to teach us is so far-reaching, I don't know how anyone would get that.

If anyone wouldn't mind helping me out, I'd really appreciate it.

pm me the specifics and I can help you out on the chemistry side. (I teach chemistry at the university level.)

As for the direct/indirection proportionality concept, try this website as it has good examples to work with:

https://www.mathsisfun.com/algebra/dire ... ional.html

Could you give an example of an easy question vs a hard question?