All categories

3 years ago

Help needed thanks it greatly appretiated

Mathematics

2 answers:

Ivan3 years ago

5 0

c is the correct answer of this question

Otrada [13]3 years ago

5 0

$\huge \boxed{ \tt option \: c}$

<h3>Step-by-step explanation:</h3>

$\sf \dfrac{15 x{y}^{2} }{15 {x}^{11} {y}^{15} }$

$\\ \\$

$\to \sf \dfrac{15 x {}^{0} {y}^{0} }{15 {x}^{11 - 1} {y}^{15 - 2} }$

$\\ \\$

$\to \sf \dfrac{15 \times 1 \times 1 }{15 {x}^{11 - 1} {y}^{15 - 2} }$

$\\ \\$

$\to \sf \dfrac{15 \times 1 \times 1 }{15 {x}^{10} {y}^{13} }$

$\\ \\$

$\to \sf \dfrac{ \cancel{15 } \times 1 \times 1 }{ \cancel{15} {x}^{10} {y}^{13} }$

$\\ \\$

$\to \sf \dfrac{ 1 }{ {x}^{10} {y}^{13} }$

You might be interested in

a 2015 Gallup poll of 1,627 adults found that only 22% felt fully engaged with their mortgage provider ?

Gala2k [10]

Answer:

1. The population of interest on this case is people who felt fully engaged with their mortgage provider

2. On this case the sample size is 1627 the number of people sample selected.

3. $ME=1.96\sqrt{\frac{0.22 (1-0.22)}{1627}}=0.0201$

4. The 95% confidence interval would be given (0.1999;0.2401).

5. We are confident 95% that the true proportion of proportion is between 0.1999 and 0.2401.

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{p(1-p)}{n}})$

1. What is the population?

The population of interest on this case is people who felt fully engaged with their mortgage provider

2. What is the sample size?

On this case the sample size is 1627 the number of people sample selected.

3. What is the 95% margin of error?

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ . And the critical value would be given by:

$z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96$

The margin of error for the proportion interval is given by this formula:

$ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$ (a)

If we replace we got:

$ME=1.96\sqrt{\frac{0.22 (1-0.22)}{1627}}=0.0201$

4. What is the 95% confidence interval?

The confidence interval would be given by this formula

$\hat p \pm z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}$

For the 95% confidence interval the value of $\alpha=1-0.95=0.05$ and $\alpha/2=0.025$ , with that value we can find the quantile required for the interval in the normal standard distribution.

$z_{\alpha/2}=1.96$

And replacing into the confidence interval formula we got:

$0.22 - 1.96 \sqrt{\frac{0.22(1-0.22)}{1627}}=0.1999$

$0.22 + 1.96 \sqrt{\frac{0.22(1-0.22)}{1627}}=0.2401$

And the 95% confidence interval would be given (0.1999;0.2401).

5. Express your answer to 4 in a meaningful sentence.

We can conclude this:

We are confident 95% that the true proportion of proportion is between 0.1999 and 0.2401.

7 0

3 years ago

HIVING BRAINLIEST

Nostrana [21]

Answer:

A = 3x³ - 22x² + 30x - 36

Step-by-step explanation:

Area of a Rectangle: A = lw

Step 1: Define

l = 3x² - 4x + 6

w = x - 6

Step 2: Substitute and Evaluate

A = (3x² - 4x + 6)(x - 6)

A = 3x³ - 4x² + 6x - 18x² + 24x - 36

A = 3x³ - 22x² + 30x - 36

3 0

3 years ago

Read 2 more answers

Jamal needs to contribute $4,050 towards his first year of college. If he has 1 year to save and $1,000 in his savings account a

Genrish500 [490]

Answer:

Jamal needs to save $254.17 each month to cover his expenses.

Step-by-step explanation:

We know that there are 12 months in a year, and Jamal already has $1,000 towards college. Jamal still needs to save $3,050 more dollars because: 4,050 - 1,000 = 3,050. Next, we take how much he has yet to pay ($3,050) divided by how many months in 1 year (12), and that gives us 254.17 per month.

4 0

3 years ago

TELL ME THE POINTS TO GRAPH TO BE MARKED BRAINLIEST

scoundrel [369]

Solve by elimination
multiply top by -1

-2x + y = -4
x - y = -2

-x = -6..............so x = 6

2(6) - y = 4
12-y = 4
-8 = -y
so y = 8

(-6,8)

6 0

4 years ago

In a shop for every pant there are 3 shirts and for every 9 shirts there are 27 pairs of shoes. Express the ratio of pants to sh

gavmur [86]

Answer:

1 : 3 : 9

Step-by-step explanation:

For every Pant = 3 shirts

Pant = x ; shirt = 3x

For :

Every 9 shirts = 27 pairs of shoes

Simplifying further :

1 shirt = 3 pairs of shoes

3 shirts = 3 * 3 = 9 pairs of shoes

Expressing as ratio:

1 Pant = 3 shirts = 9 pairs of shoes

1 : 3 : 9

5 0

3 years ago