Answer:
IM pretty sure b) and c)
Step-by-step explanation:
I'll denote the identity function by
. Then for any functions
with inverse
,

One important fact is that composition is associative, meaning for functions
, we have

So given

we can compose the functions on either side with
:

then apply the rules listed above:

Answer:
$ 7,098
Step-by-step explanation:
$2,590
+
$4,508
=
$7,098
18 - [ 18 - [ 18 - ( 18 - 1)]]
= 18 - [ 18 - [ 18 - 17]]
=18 - [ 18 - 1]
= 18 -17
=1
13. you need a total of 14 a week and you have 1