Solve the System of Linear Equations $$\left\{ \begin{array} { c } x + y + z = - 7 \\3 x + 5 y + 4 z = 8 \\3 x + 6 y + 5 z = 0\end{array} \right.$$

question 18

Multiple Choice

Solve the system of linear equations.​ $$\left\{ \begin{array} { c } x + y + z = - 7 \\3 x + 5 y + 4 z = 8 \\3 x + 6 y + 5 z = 0\end{array} \right.$$ ​

• A)​ \(( 2,37 , - 45 )\)
• B)​ \(( - 1,37 , - 45 )\)
• C)​ \(( - 1 , - 37 , - 45 )\)
• D)​ \(( 1,37 , - 45 )\)
• E)​ \(( 1,38 , - 45 )\)

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Definitions:

Stage 1 Sleep

The initial phase of sleep that is light and easily disrupted, serving as a transition from wakefulness to deeper sleep stages.

Rapid Eye Movement

A phase of sleep characterized by the random movement of the eyes, dreaming, and increased brain activity.

Stage 2 Sleep

A stage of sleep characterized by the presence of sleep spindles and K complexes, representing a deeper sleep than stage 1 and accounting for approximately 50% of sleep time in adults.