(a)

(b)we have 4 terms in this expression.
(c)+12 is the leading coefficient in

(d) constant is -45
We will need like a graph for that
There ar 4persons so each will pay

Only two persons have spent more money than everyone average i.e mia and Jasmin.
Now
- Mia has-28.47
- Jasmin has=20.99
Mia left more money so she saved most money.
Do you have a picture for this problem? There are multiple different ways to solve this problem but I'll need a picture to help you.
I don’t know what your asking