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STALIN [3.7K]
3 years ago
10

Rewrite in simplest rational exponent form x^1/2*X^1/4

Mathematics
2 answers:
nadezda [96]3 years ago
8 0

Answer:

x ^ (3/4)

Step-by-step explanation:

x^1/2*X^1/4

When we multiply and the bases are the same we can add the exponents

x ^ ( 1/2 + 1/4)

x ^ ( 2/4 + 1/4)

x ^ (3/4)

jasenka [17]3 years ago
4 0

Answer:

\sqrt[4]{x^3}

Step-by-step explanation:

First, let's examine our original statement.

x^{\frac{1}{2} }\cdot x^{\frac{1}{4}}

Using exponent rules, we know that if we have x^a \cdot x^b, then simplified, the answer will be equivalent to x^{a+b}.

So we can simplify this by adding the exponents \frac{1}{2} and \frac{1}{4}.

Converting  \frac{1}{2} into fourths gets us \frac{2}{4}.

\frac{2}{4} + \frac{1}{4} = \frac{3}{4}.

So we now have x^{\frac{3}{4}}.

When we have a number to a fraction power, it's the same thing as taking the denominator root of the base to the numerator power.

Basically, this becomes

\sqrt[4]{x^3}. (The numerator is what we raise x to the power of, the denominator is the root we take of that).

Hope this helped!

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First step.Addition error

Step-by-step explanation:

Given the equation as;

18.5 w + 6.5 w - 2.8 w = 149.1 add like terms

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According to the WHO MONICA Project the mean blood pressure for people in China is 128 mmHg with a standard deviation of 23 mmHg
adoni [48]

Answer:

a) Mean blood pressure for people in China, which has mean 128 and standard deviation 23.

b) 0.3821 = 38.21% probability that a person in China has blood pressure of 135 mmHg or more.

c) 0.714 = 71.4% probability that a person in China has blood pressure of 141 mmHg or less.

d) 0.0851 = 8.51% probability that a person in China has blood pressure between 120 and 125 mmHg.

e) Since |Z| = 0.3 < 2, it is not unusual for a person in China to have a blood pressure of 135 mmHg.

f) 90% of all people in China have a blood pressure of less than 157.44 mmHg.

Step-by-step explanation:

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.

The mean blood pressure for people in China is 128 mmHg with a standard deviation of 23 mmHg

This means that \mu = 128, \sigma = 23

a.) State the random variable.

Mean blood pressure for people in China, which has mean 128 and standard deviation 23.

b.) Find the probability that a person in China has blood pressure of 135 mmHg or more.

This is 1 subtracted by the p-value of Z when X = 135, so:

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

Z = \frac{135 - 128}{23}

Z = 0.3

Z = 0.3 has a p-value of 0.6179.

1 - 0.6179 = 0.3821

0.3821 = 38.21% probability that a person in China has blood pressure of 135 mmHg or more.

c.) Find the probability that a person in China has blood pressure of 141 mmHg or less.

This is the p-value of Z when X = 141, so:

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

Z = \frac{141 - 128}{23}

Z = 0.565

Z = 0.565 has a p-value of 0.7140.

0.714 = 71.4% probability that a person in China has blood pressure of 141 mmHg or less.

d.) Find the probability that a person in China has blood pressure between 120 and 125 mmHg.

This is the p-value of Z when X = 125 subtracted by the p-value of Z when X = 120, so:

X = 125

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

Z = \frac{125 - 128}{23}

Z = -0.13

Z = -0.13 has a p-value of 0.4483.

X = 120

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

Z = \frac{120 - 128}{23}

Z = -0.35

Z = -0.35 has a p-value of 0.3632.

0.4483 - 0.3632 = 0.0851

0.0851 = 8.51% probability that a person in China has blood pressure between 120 and 125 mmHg.

e.) Is it unusual for a person in China to have a blood pressure of 135 mmHg? Why or why not?

From item b, when X = 135, Z = 0.3.

Since |Z| = 0.3 < 2, it is not unusual for a person in China to have a blood pressure of 135 mmHg.

f.) What blood pressure do 90% of all people in China have less than?

The 90th percentile, which is X when Z has a p-value of 0.9, so X when Z = 1.28.

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

1.28 = \frac{X - 128}{23}

X - 128 = 1.28*23

X = 157.44

90% of all people in China have a blood pressure of less than 157.44 mmHg.

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2 years ago
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Answer:

A. 7

Step-by-step explanation:

4x + 3y = 29

2x - 5y = -31

4x + 3y = 29

4x - 10y = -62

13y = 91

y = 7

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2 years ago
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