Add and Subtract Matrices
-Let $\mathrm { A } = \left[ \begin{array} { r r r } 2 & 4 & 1 \\ 4 & 2 & - 1 \\ - 1 & 2 & 3 \end{array} \right]$

question 21

Multiple Choice

Add and Subtract Matrices
-Let $\mathrm { A } = \left[ \begin{array} { r r r } 2 & 4 & 1 \\ 4 & 2 & - 1 \\ - 1 & 2 & 3 \end{array} \right]$ and $\mathrm { B } = \left[ \begin{array} { r r r } 3 & - 4 & 1 \\ - 1 & 0 & 2 \\ 0 & 3 & - 2 \end{array} \right]$ . Find $\mathrm { A } + \mathrm { B }$ .

• A)
• \(\left[ \begin{array} { r r r } 5 & 0 & 2 \\ 3 & 2 & 1 \\ - 1 & 5 & 1 \end{array} \right]\)
• B)
• \(\left[ \begin{array} { r r r } 3 & - 8 & 2 \\ 5 & 2 & 1 \\ - 1 & 5 & 1 \end{array} \right]\)
• C)
• \(\left[ \begin{array} { r r r } 3 & - 8 & 2 \\ 3 & 2 & - 3 \\ 1 & 5 & 1 \end{array} \right]\)
• D)
• \(\left[ \begin{array} { r r r } 5 & 0 & 2 \\ 5 & 2 & - 3 \\ 1 & 5 & 1 \end{array} \right]\)

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Definitions:

Platelet Plug

A clot formed by platelets in response to vascular injury to prevent or stop bleeding.

Pigment

A substance that provides color to other materials, such as paint or the cells in our body.

Red Blood Cell

A type of blood cell that is primarily responsible for transporting oxygen from the lungs to the rest of the body, also known as an erythrocyte.

Rhesus Antigen

A protein substance found on the surface of red blood cells in most people, determining the positive or negative aspect of blood type and important in blood transfusions.