Find All Real Solutions to the System of Equations Using $\begin{array} { l } x ^ { 2 } + y ^ { 2 } = 80 \\x ^ { 2 } - y ^ { 2 } = - 48\end{array}$

question 79

Multiple Choice

Find all real solutions to the system of equations using the addition method.
- $\begin{array} { l } x ^ { 2 } + y ^ { 2 } = 80 \\x ^ { 2 } - y ^ { 2 } = - 48\end{array}$

• A)(4, -8), (4, 8)
• B)(4, 8), (-4, 8), (4, -8), (-4, -8)
• C)(4, 8), (8, 4), (-4, -8), (-8, -4)
• D)(-4, -8), (-8, -4)

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Definitions:

1913

A year notable for several key historical events, including the ratification of the 16th Amendment to the U.S. Constitution, introducing the federal income tax.

Excess Reserves

Banks' reserves that exceed the minimum reserve requirements set by central banking authorities, indicating additional liquidity.

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The total amount of funds that a bank has held in reserve, both required and excess, to meet its liabilities.

Required Reserves

Minimum vault cash or reserves; held at the Federal Reserve District Bank.