Add (5 + 7 I ) + (4 + 5 $-$

question 240

Multiple Choice

Add. (5 + 7 i ) + (4 + 5 i )

• A) 9 + 12 i
• B) 12 + 9 i
• C) \(-\) 9 \(-\) 12 i
• D) 21

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Definitions:

Scores

Numerical values assigned to represent the performance, achievement, or characteristics of individuals or items.

Z Scores

Standardized scores that indicate the number of standard deviations a data point is from the mean of its distribution.

Mean

The arithmetic average of a set of numbers, calculated by adding all the values together and dividing by the number of values.

Distribution

The way in which values of a variable or frequencies of outcomes are spread out or dispersed over a range of values.