Answer:
13×13×13=2197 that is the answer
8. nm , 7y , 2t
9. 3p/6 , 7(v+q) , 136z
10. 21 , 63 , 42 (the last one is cut off)
11. 36 , 84 , 32 , 81
The mistake he made is that he Yuri divided by n instead of n -1.
<h3>What mistake did he make?
</h3>
Standard deviation is used to determine how the values in a group differs from the mean of the values in the group.
In order to determine the standard deviation, take the following steps:
• Determine the mean of the observation: 14
Determine the difference between each value and the mean and then square the result: (12 - 14)² + (14 - 14)² + (9 - 14)² + (21 - 14)² = 78
Determine the mean of the sum of the squared differences and then find the square root of the mean: √78/(n - 1) = 5.1
To learn more about standard deviation, please check: brainly.com/question/26201837
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Answer:
35/7 or 5
Step-by-step explanation:
so you multiply 5 and 9 which is 45- 10 which is 35 but then its 5-(-2) which when doing this a variable minus a negative makes it a positive so then its 5+2 which is 7 then you have 35/7 or 5
Answer:
-3(3 x + 2) (2 x - 7)
Step-by-step explanation:
Factor the following:
-18 x^2 + 51 x + 42
Factor -3 out of -18 x^2 + 51 x + 42:
-3 (6 x^2 - 17 x - 14)
Factor the quadratic 6 x^2 - 17 x - 14. The coefficient of x^2 is 6 and the constant term is -14. The product of 6 and -14 is -84. The factors of -84 which sum to -17 are 4 and -21. So 6 x^2 - 17 x - 14 = 6 x^2 - 21 x + 4 x - 14 = 2 x (3 x + 2) - 7 (3 x + 2):
-32 x (3 x + 2) - 7 (3 x + 2)
Factor 3 x + 2 from 2 x (3 x + 2) - 7 (3 x + 2):
Answer: -3(3 x + 2) (2 x - 7)