Find the missing side length pls help

These appear to be right triangles? Otherwise you would have to use the special triangle formulas. If they are right triangles, use the pythagorean theorem.
c:54
b: 48
a: ~24.7

If it’s not a right triangle, I’m sorry I can’t help you.

C. i possibility the answer to this

First subtract 10 from both side
y^2+6y-16=0
(y+8)(y-2)=0
-8 and 2