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Katena32 [7]
3 years ago
9

Which expression is equal to 3(5+6)? A. 15 + 18 B. 15 + 6C. 5 + 18 D. 3 + 11

Mathematics
2 answers:
NARA [144]3 years ago
6 0
A. 15+18 is the correct answer by using distribution property
Mariana [72]3 years ago
5 0
The answer would be A. because for this problem: 3(5+6) 

What i did was i multiplied 3 and 5 which gave me 15 and then took the 3 again and multiply it by 6 which gave me 18. So your answer should be A. 15+18

Hope this helped. :)
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The data shown represent the number of runs made each year during Bill Mazeroski’s career. Check for normality.
const2013 [10]

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The given data is not normal.

Step-by-step explanation:

We are given the following data:

30, 59, 69, 50, 58, 71, 55, 43, 3,  66, 52, 56, 62, 36, 13, 29, 17, 31

Condition for normality:

Mean = Mode = Median

Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}

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Mode is the most frequent observation of the data.

Since all the value appeared once, there is no mode.

Median:\\\text{If n is odd, then}\\\\Median = \displaystyle\frac{n+1}{2}th ~term \\\\\text{If n is even, then}\\\\Median = \displaystyle\frac{\frac{n}{2}th~term + (\frac{n}{2}+1)th~term}{2}

Sorted data: 3, 13, 17, 29, 30, 31, 36, 43, 50, 52, 55, 56, 58, 59, 62, 66, 69, 71

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=\dfrac{9^{th}+10^{th}}{2} = \dfrac{50+52}{2}=51

Since the mean, mode and median of data are not equal, the data is not normal.

7 0
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