Solve the System of Equations Using Substitution $$\left\{ \begin{array} { c } x y = 72 \\x + y = 17\end{array} \right.$$

question 39

Multiple Choice

Solve the system of equations using substitution.
- $$\left\{ \begin{array} { c } x y = 72 \\x + y = 17\end{array} \right.$$

• A) x = 9, y = 8; x = 8, y = 9
• B) x = 9, y = -8; x = 8, y = -9
• C) x = -9, y = -8; x = -8, y = -9
• D) x = -9, y = 8; x = -8, y = 9

---

Definitions:

Dispositional Variables

Traits and characteristics that individuals bring to different situations, influencing their behavior and reactions.

Correlational Methods

Research techniques that study the relationship between two or more variables without determining cause and effect.

Experimental Methods

Research strategies involving the manipulation of one variable to determine its effect on another variable, within a controlled environment, to establish cause-and-effect relationships.

Randomly Assign

The process of distributing participants in a study into different groups using random methods to ensure that each participant has an equal chance of being assigned to any group.