Write the Word or Phrase That Best Completes Each Statement $$\begin{array} { l } 3 x ^ { 2 } + 10 y ^ { 2 } = 81 \\- 4 x ^ { 2 } + 9 y ^ { 2 } = 9\end{array}$$

question 456

Essay

Write the word or phrase that best completes each statement or answers the question.
Which method should be used to solve the system? Explain your answer, including a description of the first step.
$$\begin{array} { l } 3 x ^ { 2 } + 10 y ^ { 2 } = 81 \\- 4 x ^ { 2 } + 9 y ^ { 2 } = 9\end{array}$$

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Definitions:

Support

In data mining and machine learning, it often refers to the frequency or occurrence of certain patterns or relationships within a dataset.

Population Parameter

A numerical value that represents a characteristic of a population, such as its mean or variance.

Hypothesis

A proposed explanation for a phenomenon, made as a starting point for further investigation.

Assumption

A basic condition or premise considered to be true without verification or proof, often used as a starting point for further analysis.