Mr ramos thumb measures 4 cm.. express the length in meters

I'm terrible at math any here is appreciated.

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

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?