Solve the System by the Addition Method $$\left\{ \begin{array} { l } 7 x - 2 y = 6 \\- 21 x + 6 y = - 24\end{array} \right.$$

question 19

Multiple Choice

Solve the system by the addition method. If there is no solution or an infinite number of solutions, so state. Use set
notation to express the solution set.
- $$\left\{ \begin{array} { l } 7 x - 2 y = 6 \\- 21 x + 6 y = - 24\end{array} \right.$$

• A) \(\{ ( 7,6 ) \}\)
• B) \(\{ ( 3,4 ) \}\)
• C) no solution; \(\varnothing\)
• D) \(\left\{ \left( \frac { 7 } { 9 } , - \frac { 2 } { 9 } \right) \right\}\)

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Definitions:

Darley And Latané

Psychologists known for their research on the bystander effect, illustrating how individual responsibility is diluted in the presence of others.

Bystander Effect

A behavioral pattern observed in social psychology where people are less inclined to assist someone in need when there are others around.

Cognitive-Neoassociationistic Model

A theory proposing that cognition and emotions are linked in a network of associations, affecting how stimuli are processed and reactions are generated.

Aversive Events

Negative or unpleasant experiences that an individual seeks to avoid or minimize.