Here are 3 equations, one of which I have answered and am checking. Please could someone do a walk through as to how to answer it, with answer, because I can never seem to understand how to answer these questions and I always get them wrong.
1) Make a the subject : y=2u²+as. I put : a= √y/s - 2u (with the '/' being divided by) Corrections?
2) H = w²/2g (R²-r²) - Make r the subject.
3) T = √pbh/ 4+a² - Make a the subject.
In all cases, where I have put '/', I mean that it is structured like a fraction since I cant do that on here. Please help. I would appreciate a walk through for each with the answer which I can then learn from. Thank you.