Could anyone explain how to do this?
What is the value of h(–7)?

h(x) = 3|x| – 1

h(–7) = ________?

Question

Could anyone explain how to do this?
What is the value of h(–7)?

h(x)  = 3|x| – 1  

h(–7) = ________?

zzr0ck3r · Answer

hint, |-7|=7

anonymous · Answer

Wait, so do I take the 7 and put it in place of x?

anonymous · Answer

e_e Guess so?...

phi · Answer

close.  h(-7) is short-hand for
find the "definition of h(x)"
and everywhere you see "x", replace x with -7

phi · Answer

name =  formula or definition
h(x)    =     3|x| – 1 

h(-7)  =     3 |-7| -1

now you need to know what the | | things mean: absolute value.  they make whatever is inside positive.  so | 7| = 7  (no change)  but |-7| becomes 7 (-7 became +7)

phi · Answer

refresh your browser if that does not display

anonymous · Answer

Thanks, Phi.

phi · Answer

what did you get for an answer?