Solve the System of Equations by Elimination for Real Values $\left\{ \begin{array} { l } x ^ { 2 } + y ^ { 2 } = 25 \\x ^ { 2 } - y ^ { 2 } = 7\end{array} \right.$

question 52

Essay

Solve the system of equations by elimination for real values of x and y . $\left\{ \begin{array} { l } x ^ { 2 } + y ^ { 2 } = 25 \\x ^ { 2 } - y ^ { 2 } = 7\end{array} \right.$

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Definitions:

Treasury Bills

Short-term government securities issued at a discount from the face value and maturing at their face value to create a return to the investors.

Collection Time

The average period it takes for a business to receive payments owed by its customers after a sale has been made.

Lockbox System

A service provided by banks to companies for receiving payments from customers; payments are sent to a post office box and then quickly processed by the bank.

Money Market Securities

Money Market Securities are short-term debt instruments that are highly liquid and considered safe, such as Treasury bills, certificates of deposit, and commercial paper.