Question

Help?? does this mean x= |8| ?????????

If f(x) = |x + 8|, find f(–11)

Answer 1

x= |8| means that its the absolute value of 8. Do you know what absolute value is?

Answer 2

were it's always positive

Answer 3

where*

Answer 4

@Barrelracer011

Answer 5

The is the same thing I helped you with before. Replace each x with -11

Answer 6

|-11+8|=|-3|
=>3

Answer 7

| | means "make whatever is inside" positive

so |8| is 8 (8 is already positive, so the | | doesn't do anything)

| -3 | is +3 (it make the -3 a positive 3)

Answer 8

f(x) = |x + 8|

that is a rule they gave you. f(x) is the short-name for | x + 8 |

when they say f(-11) that is short-hand for "in the formula, replace x with -11, and then do the arithmetic"

in other words, you start with | x + 8| and replace x with -11. erase the x, and put in -11 in the formula
| -11 + 8 |
now do the arithmetic inside the | |. -11 + 8 is -3 (does that make sense ? )

you now have | -3 |
what is the final answer? what does the | | do to the -3 ?

Answer 9

makes it positive because | | is absolute value

Answer 10

yes, and the answer would be 3