Determine If the Matrix Is in Row-Echelon Form $$\left[ \begin{array} { r r r r | r } 1 & 0 & 0 & 0 & 2 \\0 & 1 & 0 & 0 & 4 \\0 & 0 & - 1 & 0 & 9 \\0 & 0 & 0 & 1 & - 6\end{array} \right]$$

question 151

Multiple Choice

Determine if the matrix is in row-echelon form.
- $$\left[ \begin{array} { r r r r | r } 1 & 0 & 0 & 0 & 2 \\0 & 1 & 0 & 0 & 4 \\0 & 0 & - 1 & 0 & 9 \\0 & 0 & 0 & 1 & - 6\end{array} \right]$$

• A) No
• B) Yes

---

Definitions:

Spaced Practice

A learning technique that involves breaking up studying into shorter sessions over a longer period, improving retention over time.

Overlearning

The continued practice or study of material or skills past the point of initial mastery, leading to automaticity and long-term retention.

Effective Mastery

The ability to gain skillful control or achieve a high level of competence in a particular area of activity or knowledge.

Full Night's Sleep

The period of sleep considered sufficient for optimal health and function, typically ranging from 7 to 9 hours for adults.