Suppose that BC is the base of isosceles △ABC (not shown). Suppose AB = x and BC = x + 3. Write an expression in terms of x that represents the perimeter of △ABC. Find x if the perimeter of △ABC is 42.

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation:

k

step-by-step explanation:

domit

you go to prefence in the settings and youll see a "i want to delete my account.

step-by-step explanation: