Solve the System of Equations Using Substitution $$\left\{ \begin{array} { l } x ^ { 2 } + y ^ { 2 } = 61 \\x - y = 1\end{array} \right.$$

question 42

Multiple Choice

Solve the system of equations using substitution.
- $$\left\{ \begin{array} { l } x ^ { 2 } + y ^ { 2 } = 61 \\x - y = 1\end{array} \right.$$

• A) x = 4, y = 5; x = 5, y = 4
• B) x = 4, y = -5; x = 5, y = -4
• C) x = -4, y = -5; x = 5, y = 4
• D) x = -4, y = 5; x = -5, y = 4

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The lowest layer of Earth's atmosphere, extending from the surface to about 8 to 15 kilometers high, where weather phenomena occur.

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A stratospheric layer of ozone molecules that protects life on Earth by absorbing the majority of the sun's harmful ultraviolet radiation.

Troposphere

The lowest layer of Earth's atmosphere where weather occurs and where most aviation takes place.