Question

What is this.....? |-9| I know I should know this...
Could someone explain the whole process please?

Answer 1

Those | bars mean absolute value of... (contents between bars)
for (real) numbers, it is just the positive value of the number inside of it
in equations, we have to deal with it in other ways

Answer 2

Absolute value...
http://www.purplemath.com/modules/absolute.htm

Answer 3

well, for equations with variables inside of the absolute values*

Answer 4

So it is said the absoulte value of -9?

Answer 5

So how would I find the answer? Like what is the process?

Answer 6

it is 9.
http://www.youtube.com/watch?v=qRFX_HK-6Ik
This video will help you

Answer 7

Thank you! :D