He will not need to pay a shipping fee because 12*9.75 is more than $100.
C I'm using the calculator and the other ones don't make sense
Answer:


Step-by-step explanation:
The given system is:
4x-3y=8
5x-2y=-11
We make x the subject in the top equation to get:

Plug this expression for x in the bottom equation to get

We expand to obtain

Multiply through by 4

Group similar terms



This means


let's notice, this is a Cube, namely all equal sides, and mind you it has 6 sides, Check the picture below.

First find the rate of growth
45000=18000(1+r)^(2010-2005)
Solve for r
r=((45,000÷18,000)^(1÷5)−1)×100
R=20%
Use it to find the population in 2015
P=45000(1+0.20)^(2015-2010)
P==111,974.4