Which of the following ordered pairs represents the solution to the system given below? 2x + y = 20 4x − 2y = 40 a) (10,0) b) (0,10) c) (4,2) d) (10, -10)

Which of the following ordered pairs represents the solution to the system given below?

2x + y = 20 4x − 2y = 40

answer: b.48 for

step-by-step explanation:

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: