Debra, Abdul y Reuben tienen un total de 93 entre ellos. Reuben tiene 2 veces lo que Debra tiene. Debra tiene 7 más que Abdul. ¿Cuánto dinero tiene cada uno?

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:

10 - 75

step-by-step explanation:

there's nothing attached so it's most likely anything in that range.

d is the only accurate one

step-by-step explanation:

answer is c

step-by-step explanation:

81/12=324/x

x=48