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lara [203]
3 years ago
6

1.5/4x-1=0.4/x+4 PLZ HELP PLZ HELP GIVING 7 POINTS

Mathematics
2 answers:
Damm [24]3 years ago
7 0

Answer: x

x =  100 + 32 √10 (15)

Step-by-step explanation: Solve the rational equation by combining expressions and isolating the variable  x.

slega [8]3 years ago
7 0

Answer:

X=64

Step-by-step explanation:

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Assume that blood pressure readings are normally distributed with a mean of 115 and a standard deviation of 8. If 100 people are
Sergeu [11.5K]

Answer:

D. 0.9938.

Step-by-step explanation:

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

Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

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

Mean of 115 and a standard deviation of 8.

This means that \mu = 115, \sigma = 8

100 people are randomly selected

This means that n = 100, s = \frac{8}{\sqrt{100}} = 0.8

Find the probability that their mean blood pressure will be less than 117.

This is the p-value of Z when X = 117, so:

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

By the Central Limit Theorem

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

Z = \frac{117 - 115}{0.8}

Z = 2.5

Z = 2.5 has a p-value of 0.9938, and thus, the correct answer is given by option D.

8 0
3 years ago
What is the square or square root of 6 willing to give 24 points
evablogger [386]
There is no square root of 6 all you have to do is set up a square root box and put the 6 in it then you split it into factors next you put them in another square root box finally multiply, then you get your simplest form.
6 0
3 years ago
What are the missing angle measure in a parallelogram rstu
hichkok12 [17]

The answer to the question is the second option.

6 0
2 years ago
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If you pour 3 gallons of paint into 8 cans how much will be in each can​
bezimeni [28]

Answer:

pours 3 gallons of paint equally into 5 cans. How many gallons of paint will there be in each can? ... Did you divide to get the answer? ... If two gallons of paint is needed to paint a 40 sq meter wall, how many gallons of paint ... Hamza bought 8 gallons of brown paint to paint his kitchen and dining room

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2 years ago
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Point W is located at (-2,3) on a coordinate plane. Point W is reflected over the x-axis to create point w'. Point W' is then re
aniked [119]

ANSWER

W''(2, - 3)

EXPLANATION

The given point bas coordinates

W(-2,3).

The mapping for reflection over the x-axis is

(x,y)\to(x, - y)

W(-2,3)\to \: W'(-2, - 3)

This point W'(-2,-3) is then reflected over the y-axis.

The mapping for reflection over the y-axis is

(x,y)\to (-x, y)

W'(-2,-3)\to \: W''(2, - 3)

5 0
3 years ago
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