Use Back-Substitution to Solve the Triangular System $$\left\{ \begin{aligned}x - 3 y - z & = 0 \\2 y - 8 z & = 2 \\\frac { 1 } { 4 } z & = - 1\end{aligned} \right.$$

question 79

Essay

Use back-substitution to solve the triangular system. $$\left\{ \begin{aligned}x - 3 y - z & = 0 \\2 y - 8 z & = 2 \\\frac { 1 } { 4 } z & = - 1\end{aligned} \right.$$

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Definitions:

Marginal Cost

The augmentation in total costs associated with the production of an additional unit of a product or service.

Cartel

A group of independent market participants who collude to control prices and production in order to monopolize a market.

Fixed Cost

Costs that do not change with the level of output, such as rent or salaries.

Cartel

A formal agreement among competing firms to control prices or exclude entry of a new competitor in the market, often resulting in higher prices.