Answer:
uh, the answer is either (-6, 1) or (-1,6) because the when plugging them both into the equation, they're both true.
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:


The domain of a function is the complete set of possible values of the independent variable.
Brainliest please!