What is the value of 18 − 3k + 9 when k = 4?
pls help!!

15 I think. not fully shore though

Step-by-step explanation:

Multiply 3x4. then 18-12=6. lastly add 9

15

it is given that. k= 4

so, putting the value of k. in

given equation = 18 - (3*4 ) + 9

18 - 12 + 9 = 15

hope it 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:

you can not solvr this without numbers