Which Method Should Be Used to Solve the System? Explain

question 9

Essay

Which method should be used to solve the system? Explain your answer, including a description of the first step.
-x² - y² = 16
x - 8y = -6

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Definitions:

Compounded Quarterly

The method of calculating interest where the interest is added to the principal amount four times a year.

Present Value

The current evaluation of a future sum of money or chain of cash inflows, when calculated at an explicit rate of return.

Compounded Semiannually

Compounded Semiannually refers to the process of applying interest to both the initial principal and accumulated interest of a deposit or loan on a twice-yearly basis.

Present Value

The today's price of a future amount of money or streams of cash inflow, under a specified yield rate.