Find the Indicated Matrix $A = \left[ \begin{array} { r r r } 4 & - 8 & 3 \\ 4 & 2 & - 2 \\ 8 & 1 & - 2 \end{array} \right]$

question 51

Multiple Choice

Find the indicated matrix.
-Let $A = \left[ \begin{array} { r r r } 4 & - 8 & 3 \\ 4 & 2 & - 2 \\ 8 & 1 & - 2 \end{array} \right]$ and $B = \left[ \begin{array} { r r r } 1 & - 5 & 2 \\ - 8 & 1 & - 3 \\ 4 & - 5 & - 2 \end{array} \right]$ . Find 2A-3B.

• A) \(\left[ \begin{array} { r r r } 5 & - 13 & 5 \\ - 4 & 3 & - 5 \\ 12 & - 4 & - 4 \end{array} \right]\)
• B) \(\left[ \begin{array} { r r r } 5 & - 4 & 12 \\ - 13 & 3 & - 4 \\ 5 & - 5 & - 4 \end{array} \right]\)
• C) \(\left[ \begin{array} { r r r } 9 & - 21 & 8 \\ 0 & 5 & - 7 \\ 20 & - 3 & - 6 \end{array} \right]\)
• D) \(\left[ \begin{array} { r r r } 5 & - 1 & 0 \\ 32 & 1 & 5 \\ 4 & 17 & 2 \end{array} \right]\)

---

Definitions:

Auscultating Heart Sounds

The act of listening to the heart's sounds using a stethoscope to assess its function and detect possible abnormalities.

Heart Murmur

A sound, heard through a stethoscope, indicating turbulent blood flow within the heart, which can signify a variety of heart conditions.

Bell of Stethoscope

The cup-shaped end of a stethoscope used for listening to low-pitched sounds in the body.

Moro Reflex

An infantile reflex normally present at birth and disappearing around 4 to 6 months of age, characterized by a "startle" response to loud noises or sudden movements.