Use Back-Substitution to Solve the System of Linear Equations $\left\{ \begin{array} { c c c } 4 x - 3 y - 2 z & = & 21 \\6 y - 5 z & = & 5 \\z & = & - 7\end{array} \right.$

question 89

Multiple Choice

Use back-substitution to solve the system of linear equations. $\left\{ \begin{array} { c c c } 4 x - 3 y - 2 z & = & 21 \\6 y - 5 z & = & 5 \\z & = & - 7\end{array} \right.$

• A) \(( - 2 , - 5 , - 7 )\)
• B) \(( - 2,5,7 )\)
• C) \(( - 5,7 , - 2 )\)
• D) \(( - 2 , - 5,7 )\)
• E) \(( - 5 , - 7 , - 2 )\)

Calculate and assess a company's return on assets and equity.

Understand the financial metrics related to company's operation cycle.

Compute and interpret times interest earned ratio.

Determine a company's book value per share and its implications.

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Definitions:

Simple Acinar

Pertaining to a type of simple glandular structure in the epithelium that has a single secretory duct and is typically globular in shape.

Holocrine Gland

Gland whose secretion is formed by the disintegration of entire cells (e.g., sebaceous gland).

Sebaceous Gland

A type of skin gland that produces sebum, an oily substance that helps to keep the skin and hair moisturized.

Sweat Gland

Small tubular structures of the skin that produce sweat, a fluid composed of water, minerals, and waste products.