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borishaifa [10]
3 years ago
15

What is the value of x? 76+71=124

Mathematics
2 answers:
iren [92.7K]3 years ago
7 0

Answer:

Step-by-step explanation:

124

this is the answer i think

Kisachek [45]3 years ago
6 0

Answer:

48

Step-by-step explanation:

x=48

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What is the value of x if the perimeter of both shapes is the same?
AveGali [126]

The value of x is: \frac{4}{3}

<u><em>Recall</em></u>:

Perimeter of a shape is the sum of all its sides

<em>Thus</em>:

Perimeter of the triangle = x + x +x+ 4 = 3x + 4

Perimeter of the rectangle = 2(2x) + 2(x) = 4x + 2x = 6x

We are told that the perimeter of both shapes are equal. Set both perimeters equal and solve for x.

3x + 4 = 6x

<em>Add like terms</em>

<em />4 = 6x - 3x\\4 = 3x

<em>Divide both sides by 3</em>

<em />\frac{4}{3} = x\\x = \frac{4}{3}

The value of x = \frac{4}{3}

Learn more here:

brainly.com/question/20562416

3 0
3 years ago
The CEO of a large manufacturing company is curious if there is a difference in productivity level of her warehouse employees ba
blsea [12.9K]

Answer:

The test statistic is z = -2.11.

Step-by-step explanation:

Before finding the test statistic, we need to understand the central limit theorem and subtraction of normal variables.

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.

Subtraction between normal variables:

When two normal variables are subtracted, the mean is the difference of the means, while the standard deviation is the square root of the sum of the variances.

Group 1: Sample of 35, mean of 1276, standard deviation of 347.

This means that:

\mu_1 = 1276, s_1 = \frac{347}{\sqrt{35}} = 58.6537

Group 2: Sample of 35, mean of 1439, standard deviation of 298.

This means that:

\mu_2 = 1439, s_2 = \frac{298}{\sqrt{35}} = 50.3712

Test if there is a difference in productivity level.

At the null hypothesis, we test that there is no difference, that is, the subtraction is 0. So

H_0: \mu_1 - \mu_2 = 0

At the alternate hypothesis, we test that there is difference, that is, the subtraction is different of 0. So

H_1: \mu_1 - \mu_2 \neq 0

The test statistic is:

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

In which X is the sample mean, \mu is the value tested at the null hypothesis and s is the standard error.

0 is tested at the null hypothesis:

This means that \mu = 0

From the two samples:

X = \mu_1 - \mu_2 = 1276 - 1439 = -163

s = \sqrt{s_1^2+s_2^2} = \sqrt{58.6537^2+50.3712^2} = 77.3144

Test statistic:

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

z = \frac{-163 - 0}{77.3144}

z = -2.11

The test statistic is z = -2.11.

7 0
3 years ago
The organization sent
ValentinkaMS [17]

Answer:

<h2>The percentage of the people invited attended the fundraising event is <u>6</u><u>9</u><u>.</u><u>3</u><u>3</u><u>%</u>.</h2>

Step-by-step explanation:

To find the percentage of those who attended the fundraising event, simply divide the number of attendees to the total number invited.

\frac{416}{640}  = 0.69333333 = \boxed{69.33\%}

7 0
3 years ago
There are two urns, each of them containing two blue balls and two red balls. We randomly draw two balls from the first urn and
mafiozo [28]

Answer: 50/50

Step-by-step explanation:

6 0
3 years ago
Someone please help me with this question
mestny [16]

Answer:

how many floors the elevator goes down per unit of time

Step-by-step explanation:

not sure what the unit of time is but its seconds or minutes im pretty sure it doesnt say

4 0
3 years ago
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