Solve the System Using Matrices $$\begin{array} { l } 5 x + 4 y = 32 \\- 9 x + 7 y = - 86\end{array}$$

question 58

Multiple Choice

Solve the system using matrices.
- $$\begin{array} { l } 5 x + 4 y = 32 \\- 9 x + 7 y = - 86\end{array}$$

• A)(7, -1)
• B)(8, -2)
• C)(-8, -1)
• D)inconsistent system

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Definitions:

Lewis Dot Structure

An illustration depicting the connections between a molecule's atoms and displaying the presence of electrons that are not bonded, if any.

Calcium

A metallic chemical element essential for living organisms, particularly in cell physiology and bone formation.

Chlorine

Chlorine is a chemical element with symbol Cl and atomic number 17, known for its powerful disinfectant properties and use in water purification.

Lewis Dot Structure

A diagram that represents the valence electrons of an atom as dots around the elements' symbols and indicates the bonding between atoms in a molecule.