Answer:
None of the listed
Step-by-step explanation:

9 feet and 1 inch is your answer
X=11
All you have to do is add 5 to both sides and then divide by 5 on both sides
Answer:
The system that can be used is:


Step-by-step explanation:
We have that:
x is the price of a package of sugar cookies, y is the price of a package of oatmeal cookies.
Shaikha sold 10 packages of sugar cookies and 2 packages of oatmeal cookies for $56.
This means that:

Khalid sold 9 packages of sugar cookies and 3 packages of oatmeal cookies for $60.
This means that 
System that can be used:
The system that can be used is:


It changed by $.04 in 4 years.
$.04 / 4 = $.01
The stamp changed by 1 cent/year