Ms. lulling needs n cents in quarters to do the family laundry at the city laundromat. She has 0.75 in quarters. Which equations show the relationships between n, the amount of cents she needs, and q the numbers of quarters she needs?

A. n=25q
B. q=75+25n
C. n=75+25q
D. 75=n+25q

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:

answer: y=0 if that is what u r looking for