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3 years ago

How many real roots and how many complex roots does this expression have? (x+7)^7

Mathematics

1 answer:

Feliz [49]3 years ago

3 0

Answer:

One real root, with multiplicity 7.

Step-by-step explanation:

The given expresion is

${(x + 7)}^{7}$

This is a seventh degree polynomial.

According to the fundamental theorem of Algebra, the expression has a potential 7 roots both real and complex.

This expression has one real root, with multiplicity , 7.

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Your petty cash has a balance of $73.28. Your Center Manager provides you with two receipts totalling $52.29. How much cash rema

Dvinal [7]

Answer:

Cash remaining in the petty cash box = 20.99 dollars

Explanation:

Given that,

Petty cash has a balance of = 73.28 dollars

Total receipt = 52.29 dollars

We need to find the remaining petty cash .

In order to find out the remaining cash, we will subtract total receipt from Petty cash balance.

Cash remain = Petty cash balance - total receipt

Cash remain = $73.28 - $52.29

Cash remain = 20.99 dollars

That's the final answer.

I hope it will help you.

4 0

3 years ago

Which angle below is another name for ZABC?

Liula [17]

Answer is none of these

5 0

3 years ago

The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in t

andreyandreev [35.5K]

Answer:

The test statistic is c. 2.00

The p-value is a. 0.0456

At the 5% level, you b. reject the null hypothesis

Step-by-step explanation:

We want to test to determine whether or not the mean waiting time of all customers is significantly different than 3 minutes.

This means that the mean and the alternate hypothesis are:

Null: $H_{0} = 3$

Alternate: $H_{a} = 3$

The test-statistic is given by:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, $\sigma$ is the standard deviation and n is the size of the sample.

Sample of 100 customers.

This means that $n = 100$

3 tested at the null hypothesis

This means that $\mu = 3$

The average length of time it took the customers in the sample to check out was 3.1 minutes.

This means that $X = 3.1$

The population standard deviation is known at 0.5 minutes.

This means that $\sigma = 0.5$

Value of the test-statistic:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$z = \frac{3.1 - 3}{\frac{0.5}{\sqrt{100}}}$

$z = 2$

The test statistic is z = 2.

The p-value is

Mean different than 3, so the pvalue is 2 multiplied by 1 subtracted by the pvalue of Z when z = 2.

z = 2 has a pvalue of 0.9772

2*(1 - 0.9772) = 2*0.0228 = 0.0456

At the 5% level

0.0456 < 0.05, which means that the null hypothesis is rejected.

7 0

3 years ago

Of the 50 plays attributed to a playwright, 11 are comedies, 19 are tragedies, and 20 are histories. If one play is selected

Cerrena [4.2K]

The answer is 3/5, or 60%

11 (comedies) + 19 (tragedies) = 30
30/50 = 3/5, or 60%

3 0

3 years ago

Convert 3π into degrees

fiasKO [112]

3π = 540 Degrees
Hope it helped :)

7 0

3 years ago

Read 2 more answers