Determine Whether the Given Ordered Pair Is a Solution of the System

question 71

Multiple Choice

Determine whether the given ordered pair is a solution of the system.
- $$\begin{array} { l } ( 1 , - 2 ) \\x + y = - 1 \\x - y = 3\end{array}$$

• A) solution
• B) not a solution

---

Definitions:

Observer Movement

In experimental research, this term describes the actions or movements made by an observer, which can potentially influence the subject's behavior.

Opposite Direction

A course or path that differs by 180 degrees from the original or compared direction, often used in physics, navigation, and general descriptions of movement or orientation.

Same Direction

A situation or condition in which multiple objects, forces, or trends are moving or oriented towards the same point or path.

Eyes Distance

Refers to the measurement between the centers of the pupils of the eyes, important in various fields such as optics and anthropometry.