Plato! 17 points! will mark brainliest!
select the correct answer.
which formula gives the standard deviation of a data set?

The answer is between B and C.

There are two different versions of standard deviation. The population standard deviation will use the formula shown in choice C, while the sample standard deviation uses the formula in choice B.

The instructions arent fully clear which your teacher wants. I would ask them for further clarification. I'm sorry I'm not more helpful.

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb