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andrey2020 [161]
3 years ago
8

4k-5-4k=-12-kwhat's the answer

Mathematics
1 answer:
Masteriza [31]3 years ago
3 0
First you have to get all the k's on one side.
4k - 4k + k =  - 12  + 5
And Then combine like terms
k =  - 7
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bulgar [2K]

Answer:

2.28% probability that a person selected at random will have an IQ of 110 or greater

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

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

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 100, \sigma = 5

What is the probability that a person selected at random will have an IQ of 110 or greater?

This is 1 subtracted by the pvalue of Z when X = 110. So

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

Z = \frac{110 - 100}{5}

Z = 2

Z = 2 has a pvalue of 0.9772

1 - 0.9772 = 0.0228

2.28% probability that a person selected at random will have an IQ of 110 or greater

5 0
3 years ago
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liraira [26]

Answer:

a. 14

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Step-by-step explanation:

a. ex: (6+3)2 - 4 = 9(2) - 4

18 - 4 = <u>14</u>

b. ex: 23 + (14 - 4) / 2

Use PEMDAS

P 1st

10

D over A

5

A

<u>28</u>

<em><u>Hope this helps!</u></em>

5 0
2 years ago
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Rudiy27

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Step-by-step explanation:

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3 years ago
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Explanation:
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DENIUS [597]

Answer:

116 cm²

Step-by-step explanation:

The area of a circle = πr² ← r is the radius

shaded area = external area - internal area

                      = π × 6.5² - π × 2.3²

                      = π( 42.25 - 5.29)

                      = π × 36.96 ≈ 116 cm²

4 0
2 years ago
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