Simplify the Expression $$( - 9 x ) ( 7 y )$$

question 78

Multiple Choice

Simplify the expression. $$( - 9 x ) ( 7 y )$$

• A) \(- 63 x ^ { 2 } y ^ { 2 }\)
• B) \(63 x y\)
• C) \(- 16 x y\)
• D) \(- 63 x y\)
• E) \(- 16 ( x - y )\)

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Definitions:

Dependent Variable

In an experiment, the condition that may or may not change as a result of changes in the independent variable.

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A dietary addition that provides nutrients, such as vitamins or minerals, intended to supplement one's nutrition.

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A standardized test designed to measure human intelligence and cognitive abilities in relation to an average score for one's age group.

Independent Variable

In an experiment, the condition over which the experimenter has direct control.