Use Cramer's Rule to Solve (If Possible) the System of Equations

question 13

Multiple Choice

Use Cramer's Rule to solve (if possible) the system of equations. $\left\{ \begin{array} { r } - 0.4 x + 0.8 y = 1.6 \\0.2 x + 0.3 y = 2.3\end{array} \right.$

• A) \(\left( - \frac { 34 } { 7 } , - \frac { 31 } { 7 } \right)\)
• B) \(\left( \frac { 34 } { 7 } , \frac { 31 } { 7 } \right)\)
• C) \(\left( \frac { 34 } { 7 } , - \frac { 31 } { 7 } \right)\)
• D) \(\left( \frac { 31 } { 7 } , \frac { 34 } { 7 } \right)\)
• E) \(\left( - \frac { 34 } { 7 } , \frac { 31 } { 7 } \right)\)

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Definitions:

Decimal Places

The number of digits to the right of the decimal point in a number, specifying its precision.

Currency Field

A specific data type in databases used to store monetary values, ensuring accurate financial data representation with appropriate decimal places.

Table Datasheet

A view in database applications that displays data in rows and columns, similar to a spreadsheet, allowing for data entry and editing.

Property Sheet

A tool in development environments that lists the properties of a selected object and allows the user to edit those properties.