Holly, maria and johnny went to a fair over spring break. holly paid $12.50 and went on one ride. maria paid $15.00 and went on two rides. johnny paid $20.00 and went on 4 rides. with x being the number of rides and y being the total amount paid, is the situation linear and why

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4

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: