Pir D Literal Equations Help. My Teacher Gave Me Some Questions But No Answers To Check With...?

Literal equations help. my teacher gave me some questions but no answers to check with...? - pir d

I did what only the things that had a little difficulty, and would be able to check my answers. If anyone knows how to do and feel as if I was the answer, owuld be greatly appreciated!

1. F = (L ^ 2 - d ^ 2) / 4L
Solution for the value of d. D 9get on one side of the equation, eg d = .....

2. s = pir (R + H)
clearly h
PI PI is not like the letters P and I

3. fd = mv ^ 2 / 2 - mu ^ 2 / 2
Solution for V

4. f = v * f / v + u
Solution for u


Any help would be much appreciated!