1.where is the number 3 − 7 located on a horizontal number line?

a: 4 units to the left of 3
b: 7 units to the left of 3
c: 4 units to the right of 3
d: 7 units to the right of 3

2.simplify 7 + (−3).

a: −10

b: −4

c: 4

d: 10

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: