1.2 = m - 2.5 m=?
What would be the answer?

3.7

Step-by-step explanation:

1. 2 = m - 2.5

m =?

from the question simple arithmetic will be applied by simply collecting the like terms together

therefore; m = 1.2 + 2.5

m = 3.7

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: