Solve the System by the Substitution Method $$\begin{array} { l } 49 x ^ { 2 } + 64 y ^ { 2 } = 3136 \\8 y + 7 x = 56\end{array}$$

question 10

Multiple Choice

Solve the system by the substitution method.
- $$\begin{array} { l } 49 x ^ { 2 } + 64 y ^ { 2 } = 3136 \\8 y + 7 x = 56\end{array}$$

• A) \(( 0,8 ) , ( 7,0 )\)
• B) \(( 0,7 ) , ( 8,0 )\)
• C) \(( 0 , - 8 ) , ( 0 , - 7 )\)
• D) \(( 0 , - 7 ) , ( - 8,0 )\)

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Definitions:

Inventories

Goods and materials that a business holds for the purpose of sale or production in the future.

Autonomous Investment

Investment that is not influenced by the current level of income or production, often driven by technological innovations or changes in policy.

Aggregate Expenditure Line

A visual depiction in macroeconomics illustrating the overall expenditures on goods and services within an economy across different income levels.

Marginal Propensity

The tendency of a person to spend an additional unit of currency; often relates to income in the context of marginal propensity to consume or save.