Solve the System by Substitution $$\begin{aligned}x + 2 y & = 10 \\2 x - 7 y & = - 2\end{aligned}$$

question 179

Multiple Choice

Solve the system by substitution.
- $$\begin{aligned}x + 2 y & = 10 \\2 x - 7 y & = - 2\end{aligned}$$

• A) \(\{ ( 6,2 ) \}\)
• B) \(\left\{ ( x , y ) \mid y = - \frac { 1 } { 2 } x + 5 \right\}\); The equations are dependent
• C) \(\{ ( 14 , - 2 ) \}\)
• D) \(\{ ( 13,4 ) \}\)

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Definitions:

Hardness

A measure of how resistant a material is to deformation, scratching, or penetration.

Fractures

Breaks or cracks in rock or bone, often resulting from stress or impact.

Sulfide Mineral

A mineral compound characterized by the presence of sulfur in combination with metals such as iron, copper, or zinc.

Cube-Shaped Crystals

Crystalline structures that manifest in a cubic shape, common in minerals like pyrite and halite.