Find the sum pleaseee

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

What are the solution(s) to the quadratic equation x2 – 25 = 0? o x = 5 and x = -5ox=25 and x = -25o x = 125 and x = -125o no real solution

If a || b and e || f , what if the value of y ?