Add or Subtract $( 7 + \sqrt { - 2 } ) + ( 5 - \sqrt { - 72 } )$

question 206

Multiple Choice

Add or subtract.
- $( 7 + \sqrt { - 2 } ) + ( 5 - \sqrt { - 72 } )$

• A) \(12 - 5 \mathrm { i } \sqrt { 2 }\)
• B) \(12 + 5 \sqrt { 2 }\)
• C) \(12 - 5 \sqrt { 2 }\)
• D) \(12 + 5 \mathrm { i } \sqrt { 2 }\)

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Definitions:

Sample Variance

A statistic that measures the dispersion of a sample dataset, representing the average of the squared differences from the sample mean.

Population Variance

Population variance is a measure of the spread between numbers in a data set, representing the average of the squared differences from the population mean.

Random Sample

A selection taken from a group where each individual has the same probability of being chosen.

Hypothesis

A proposed explanation for a phenomenon, designed to be tested through experimentation or observation.