Solve the System by Substitution $$\begin{array} { l } - 2 x = 5 y + 20 \\- 31 = 3 y - 3 x\end{array}$$

question 195

Multiple Choice

Solve the system by substitution.
- $$\begin{array} { l } - 2 x = 5 y + 20 \\- 31 = 3 y - 3 x\end{array}$$

• A) \(\left\{ \left( - \frac { 122 } { 21 } , \frac { 95 } { 21 } \right) \right\}\)
• B) \(\left\{ \left( - \frac { 95 } { 21 } , - \frac { 122 } { 21 } \right) \right\}\)
• C) \(\left\{ \left( \frac { 95 } { 21 } , - \frac { 122 } { 21 } \right) \right\}\)
• D) \(\left\{ \left( \frac { 85 } { 21 } , - \frac { 122 } { 21 } \right) \right\}\)

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Definitions:

Marginal Cost

The upsurge in full costs resulting from the fabrication of an additional unit of a product or service.

Marginal-Cost Curve

A graphical representation showing how the cost to produce one additional unit of a good or service changes as production volume changes.

Average-Total-Cost Curve

A curve showing the average total cost of producing different levels of output in the short run.

Punishment

A consequence imposed after an undesirable behavior, aimed at reducing that behavior.