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kykrilka [37]
3 years ago
8

15=1/2+3/2x+10

Mathematics
2 answers:
enot [183]3 years ago
7 0

Answer:

x = 1/3

Step-by-step explanation:

15 = 1/2 + 3/2x + 10

15 - 1/2 -10 = 3/2x

9/2 = 3/2x

9 x 2x = 3 x 2

18x = 6

x = 6/18

x = 1/3

Xelga [282]3 years ago
6 0

Answer:

x = 3

Step-by-step explanation:

15 = 1/2 + 3/2x + 10                  

14.5 = 3/2x + 10                      Subtract 1/2 to both sides

4.5 = 3/2x                               Subtract 10 to both sides

3 = x                                        Divide 3/2 to both sides

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MrRa [10]

Answer:

About 99.7% of births would be expected to occur within 51 days of the mean pregnancy​ length

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Standard deviation = 17.

About what percentage of births would be expected to occur within 51 days of the mean pregnancy​ length?

51/17 = 3.

So, within 3 standard deviations of the mean.

About 99.7% of births would be expected to occur within 51 days of the mean pregnancy​ length

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2 years ago
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