Answer:
- (d) (x² + y² + z²)³ = 27x²y²z²
Step-by-step explanation:
<u>Use the identity:</u>
- a³ + b³ + c³ = 3abc if a + b + c = 0
<u>Substitute as follows:</u>
<u>The sum of the cubes is:</u>
- x² + y² + z² = 3(xyz)

<u>Cube both sides:</u>
- (x² + y² + z²)³ = 27x²y²z²
Correct choice is (d)
Part A: Students from high school B is the most consistent, because their standard deviation (σ=28.2) is the smaller than that of A and C. Smaller standard deviation means less variations among the values, or more consistence.
Part B: High school A has the highest average attendance, because it has higher mean (82) than B and C. Mean is mathematically the same as average, total number of days attended by all students divided by the number of students.
Answer:
1
Step-by-step explanation:
Answer:
1. The median.
Step-by-step explanation:
First arrange in ascending order:
5.8 6.1 6.1 6.2 6.2 6.2 6.3 6.8 6.8 7
The median = 6.2. On the box plot the median is marked at 6.3 so that is incorrect. All the others are correct
Answer:
The answer is B.
Step-by-step explanation:
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