Simplify
- $( 12 y + 9 ) + \left( 11 y ^ { 2 } - 6 y + 9 \right)$

question 12

Multiple Choice

Simplify.
- $( 12 y + 9 ) + \left( 11 y ^ { 2 } - 6 y + 9 \right)$

• A) \(11 y ^ { 2 } + 18 y - 18\)
• B) \(29 y ^ { 6 }\)
• C) \(11 y ^ { 2 } - 6 y + 18\)
• D) \(11 y ^ { 2 } + 6 y + 18\)

Determine the effects of changes in data (such as increases or decreases in means or standard deviations) on summary statistics.

Understand and calculate new mean and standard deviation after data modification.

Apply statistical concepts to make decisions in hypothetical scenarios.

Understand the properties of normal distribution through practical examples.