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3 years ago

Consider the following 8 numbers, where one labelled x is unknown.

Mathematics

2 answers:

In-s [12.5K]3 years ago

6 0

Answer:

X = 65.

Step-by-step explanation:

The range is the greatest number - least, so we have:

X - 12 = 53

X = 53 + 12 = 65.

NeTakaya3 years ago

4 0

Answer:

I think x=65

Step-by-step explanation:

Hope this helped have an amazing day/month/year!

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Assume that adults have IQ scores that are normally distributed with a mean of mu equals 105 and a standard deviation sigma equa

kondor19780726 [428]

Answer: 0.6827

Step-by-step explanation:

Given : Mean IQ score : $\mu=105$

Standard deviation : $\sigma=15$

We assume that adults have IQ scores that are normally distributed .

Let x be the random variable that represents the IQ score of adults .

z-score : $z=\dfrac{x-\mu}{\sigma}$

For x= 90

$z=\dfrac{90-105}{15}\approx-1$

For x= 120

$z=\dfrac{120-105}{15}\approx1$

By using the standard normal distribution table , we have

The p-value : $P(90$

$P(z$

Hence, the probability that a randomly selected adult has an IQ between 90 and 120 =0.6827

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Step-by-step explanation:

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Cheyenne drove 3000 miles in 75 hours. At this rate, how long will it take her to drive 4000 miles?

lyudmila [28]

Set up a proportion:
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