Answer:
The system of equations are:

CDs sold this week is 26 and that of last week is 84.
Step-by-step explanation:
Let the number of CDs sold this week be
and last week be 
Given:
CDs sold last week = 6 more than 3 times she sold this week
∴
------------- 1
Also, total number of CDs sold are 110.
∴
------------ 2
Therefore, the above two equations are systems of equations that can be used to find the number of CDs she sold last week and the number of CDs she sold this week.
Now, in order to solve, we plug in the value of
from equation (1) in equation (2). This gives,

Now, 
Therefore, the number of CDs sold this week is 26 and last week is 84.
Since Garrett and Carter bought popcorn and drinks, we have to figure out how much money is 1 drink and 1 popcorn. I figured the best way is to figure out half of $12.50 because 2 drinks and 2 popcorn cost that amount of money. You divide $12.50 by 2 to figure out half of that amount. The quotient equals to $6.25.
Answer:
Enter it into Desmos!
Step-by-step explanation:
Answer:
$9.57
Step-by-step explanation:
You have to do 4.35 divided by 5 to get how much 1 can cost. You will find out that 1 can cost $0.87. Next you will take how much one cost and mutiply it by 11. When you do that you will get 9.57. That is how you will get $9.57 as your answer.