What is the expression for f(x) when we rewrite 5^-4x+7/125^x as 5^f(x)
f(x)=

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:

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70

squares, rhombus, rectangles

its line 2 i just added the rest or else it wouldn't let me answer