Solve the System by the Method of Substitution $\left\{ \begin{aligned}\frac { 1 } { 5 } x + \frac { 1 } { 2 } y & = 8 \\x + y & = 21\end{aligned} \right.$

question 5

Multiple Choice

Solve the system by the method of substitution. $\left\{ \begin{aligned}\frac { 1 } { 5 } x + \frac { 1 } { 2 } y & = 8 \\x + y & = 21\end{aligned} \right.$

• A) \(\left( \frac { 25 } { 3 } , - \frac { 38 } { 3 } \right)\)
• B)(25, 38)
• C) \(\left( - \frac { 25 } { 3 } , \frac { 38 } { 3 } \right)\)
• D) \(\left( \frac { 25 } { 3 } , \frac { 38 } { 3 } \right)\)
• E)(-25, -38)

---

Definitions:

Hue

The dimension of visual experience specified by color names and related to the wavelength of light.

Intensity

The degree of strength, force, or energy of a stimulus or behavior.

Amplitude

The height or strength of a wave signal, which in the context of sound refers to its loudness and in light, its brightness.

Sound Wave

A wave of compression and rarefaction, by which sound is propagated in an elastic medium such as air.