Find the Indicated Sum or Difference $$\left( 7 b ^ { 2 } + 9 b \right) + \left( 9 b ^ { 2 } - 7 b + 8 \right)$$

question 18

Multiple Choice

Find the indicated sum or difference. $$\left( 7 b ^ { 2 } + 9 b \right) + \left( 9 b ^ { 2 } - 7 b + 8 \right)$$

• A) \(16 b ^ { 2 } + 2 b - 8\)
• B) \(17 b ^ { 2 } + 2 b + 8\)
• C) \(16 b ^ { 2 } + 2 b + 8\)
• D) \(16 b ^ { 2 } + 2 b\)
• E) \(16 b ^ { 2 } + 16 b + 8\)

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Definitions:

Double-Blind Experiment

An experimental design in which neither the experimenter nor the participants are aware of which participants are in the experimental group and which are in the control group until the results are calculated.

Experimental Group

The participants in an experiment who receive the drug or other treatment under study—that is, those who are exposed to the change that the independent variable represents.

Placebo Effect

A phenomenon in which a person experiences a physiological or psychological improvement after being given a treatment with no therapeutic value.

Anxiety Disorder

A category of mental health diagnoses that lead to excessive nervousness, fear, apprehension, and worry.