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chubhunter [2.5K]
3 years ago
12

-5(x+2)+3x= Which expression can be written in the box on the other side of the equation

Mathematics
2 answers:
storchak [24]3 years ago
4 0

Answer:

O-2(x+5)

Step-by-step explanation:

I have to much time on my hands

blagie [28]3 years ago
4 0

Answer:

-2x-10

Step-by-step explanation:

-5(x+2)+3x=

Distribute

-5x-10 +3x

Combine like terms

-2x-10

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A researcher wants to find out if there is a significant difference between men and women in the average number of tattoos that
kifflom [539]

Answer:

The correct option is (A).

Step-by-step explanation:

The p-value is well-defined as per the probability, [under the null-hypothesis (H₀)], of attaining a result equivalent to or more extreme than what was the truly observed value of the test statistic.

A small p-value (typically p < 0.05) specifies strong evidence against the null hypothesis (H₀), so the null hypothesis is rejected. A p-value less than 0.05 is considered as statistically significant.

A large p-value (p > 0.05) specifies fragile proof against the H₀, so the null hypothesis is failed to be rejected.

In this case the <em>p</em>-value of the test is,

<em>p</em>-value = 0.003

And the significance level of the test was,

<em>α</em> = 0.05.

p-value = 0.003 < <em>α</em> = 0.05.

The p-value less than the significance level of the test.

Thus, the results are statistically significant.

The correct option is (A).

8 0
3 years ago
I need help with math
aksik [14]
Well what is the problem ?
8 0
3 years ago
What is the equation of the line that goes through the points (0, 7) and (1, 9)? y=7x+2 y=2x+7 y=7x+9 none of the above
Luda [366]

Answer:

2x + 7

Step-by-step explanation:

0,7 is the y intercept, so plus 7 is a given

0,7    1,9    use rise/run

9-7/1-0 = 2/1

so 2x + 7

6 0
3 years ago
Suppose that the walking step lengths of adult males are normally distributed with a mean of 2.5 feet and a standard deviation o
Mumz [18]

Answer:

0% probability that the mean of the sample taken is less than 2.2 feet.

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 2.5 feet and a standard deviation of 0.2 feet.

This means that \mu = 2.5, \sigma = 0.2

Sample of 41

This means that n = 41, s = \frac{0.2}{\sqrt{41}}

Find the probability that the mean of the sample taken is less than 2.2 feet.

This is the p-value of Z when X = 2.2 So

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

By the Central Limit Theorem

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

Z = \frac{2.2 - 2.5}{\frac{0.2}{\sqrt{41}}}

Z = -9.6

Z = -9.6 has a p-value of 0.

0% probability that the mean of the sample taken is less than 2.2 feet.

6 0
3 years ago
Jessica got a prepaid debit card with $20 on it. For her first purchase with the card, she bought some bulk ribbon at a craft st
faltersainse [42]
I don’t know but can you please help me out
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2 years ago
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