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Vlada [557]
2 years ago
9

| 7m + 4 | = 1 just need to find "m"

Mathematics
2 answers:
sweet [91]2 years ago
7 0
| 7m + 4 | = 1\\\\ 7m + 4 = 1\ \ \ \vee \ \ \ 7m + 4 = -1\\\\ 7m = 1-4\ \ \ \vee \ \ \ 7m = -1-4\\\\ 7m = -3\ \ \ \vee \ \ \ 7m = -5\\\\ m =-\frac{3}{7}\ \ \ \vee \ \ \ m = - \frac{5}{7}


MAVERICK [17]2 years ago
6 0
|7m + 4| = 1
7m + 4 = 1
<u>        -4  -4</u>
      <u>7m</u> = <u>-3</u>
        7      7
        m = -3/7
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14.69% probability that this happens

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

When the distribution is normal, we use the z-score formula.

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Z = \frac{X - \mu}{\sigma}

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For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

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This means that n = 1000

Let us assume that each customer cancels their reservation with a probability of 0.1.

So 0.9 probability that they still keep their booking, which means that p = 0.9

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