algebraic expression

Answer:

A mathematical expression that includes numbers, variables, and operation symbols.
(x+5=)

conjecture

Answer:

an educated guess. an unproven statement that is based on observations

coordinate plane

Answer:

A coordinate system formed by the intersection of a horizontal number line, called the x-axis, and a vertical number line, called the y-axis.

counterexample

Answer:

an example that proves a statement false

deductive reasoning

Answer:

the process of using facts, properties, or rules to justify reasoning or reach valid conclusions

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