Alarge bag of marbles are 1/5 red 30% green, and .35 of the marbles are blue. the rest are white. what % are white?

15%.

Step-by-step explanation:

1/5 = 20%

0.35 = 35%

% white = 100 - 30 - 20 - 35

=  100 - 85

= 15%,

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:

y + 11 = (1/4)(x + 16)

step-by-step explanation: