Renna pushed the button for the elevator to go up, but it would not move. the weight limit for the elevator is 450 kilograms, but the current group of passengers weighs a total of 750 kilograms. renna wants to determine how many 70 kilogram passengers need to get off the elevator.
let p represent the number of excess passengers. write an inequality to determine the number of passengers who need to get off the elevator to meet the weight requirement.

The answer is really 5 and the inequality is 750-70p≤450. 750−70p

750−750−70p

−70p

−70

−70p

p

p

≤450

≤450−750

≤−300

≥  

−70

−300

   (divide both sides by −70)

≥  

−70

−300

≥4  

7

2

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:

72 is the answer to this problem