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Archy [21]
2 years ago
13

Find the missing number so that the equation has no solutions. -4x - 15 = x + 6

Mathematics
1 answer:
Tems11 [23]2 years ago
5 0

Answer:

-4.

Step-by-step explanation:

-4x - 15 = -4x + 6

has no solution.

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A person read that the average number of hours an adult sleeps on Friday night to Saturday morning was 7.2 hours. The
Elan Coil [88]

Calculate the value of z and its probability, since with this we can know how likely it is that this will happen.

We have that the mean (m) is equal to 8.3, the standard deviation (sd) 1.2 and the sample size (n) = 15

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For this, the first thing is to calculate z, which is given by the following equation:

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P (z = -3.55) = 0.0001

The probability is 0.01 %

This affirms that the students do not sleep what the study says because the probability of this happening according to the survey is almost nil.

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