2 years ago

X/4 - 3 = -7 what is x equal to?

Mathematics

1 answer:

yaroslaw [1]2 years ago

5 0

Answer:

x=-16

Step-by-step explanation:

x/4-3=-7

x/4=-4

x=-16

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Drupady [299]

I hope this is right but:
Let n=number of full time employees

260<=20+n*40
260-20<=N*40
240<=n*40
n>=240/40
n>=6 full time employees

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Step-by-step explanation:

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2 years ago

In a large population of college-educated adults, the mean IQ is 118 with a standard deviation of 20. Suppose 200 adults from th

cricket20 [7]

Answer: 0.0793

Step-by-step explanation:

Let the IQ of the educated adults be X then;

Assume X follows a normal distribution with mean 118 and standard deviation of 20.

This is a sampling question with sample size, n =200

To find the probability that the sample mean IQ is greater than 120:

P(X > 120) = 1 - P(X < 120)

Standardize the mean IQ using the sampling formula : Z = (X - μ) / σ/sqrt n

Where; X = sample mean IQ; μ =population mean IQ; σ = population standard deviation and n = sample size

Therefore, P(X>120) = 1 - P(Z < (120 - 118)/20/sqrt 200)

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The P(Z<1.41) can then be obtained from the Z tables and the value is 0.9207

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2 years ago