Twice the sum of a number and nine is 24. Find the number.

3

Step-by-step explanation:

2 (n + 9) = 24 this is the equation

to solve for n (number):

2(n+9)=24 // Distribute the 2 into parentheses

2n + 18 = 24 // Subtract 18 on both sides of equal sign

      - 18   -18

      2n = 6 // Divide by 2 on both sides of equal sign

        2     2

      n = 3

Hope this helps :)

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:

two data sets with the same median will not have the same varaibility

step-by-step explanation: