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3 years ago

Please help me. WILL GIVE BRAINLIEST

Mathematics

2 answers:

AnnZ [28]3 years ago

6 0

Answer:

third option

Step-by-step explanation:

Given that x = - 2 + $\sqrt{8}$ is a root

Complex roots always occur as conjugate pairs , thus

x = - 2 + $\sqrt{8}$ is a root then x = - 2 - $\sqrt{8}$ is a root

The required factor is then

(x - (- 2 - $\sqrt{8}$ ) )

Aloiza [94]3 years ago

3 0

Answer:

Step-by-step explanation:

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6(21)+6(31) evaluate

Artist 52 [7]

6(21)=72 6(31)=186
add 72+186=258

258 is the answer

6 0

2 years ago

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In preparation for an earnings report, a large retailer wants to estimate p= the proportion of annual sales

mr Goodwill [35]

Using the z-distribution, it is found that the 95% confidence interval for the proportion of sales that occured in December is (0.1648, 0.2948).

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which:

$\pi$ is the sample proportion.

z is the critical value.

n is the sample size.

In this problem, we have a 95% confidence level, hence $\alpha = 0.95$ , z is the value of Z that has a p-value of $\frac{1+0.95}{2} = 0.975$ , so the critical value is z = 1.96.

The sample size and the estimate are given by:

$n = 161, \pi = \frac{37}{161} = 0.2298$

Hence:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2298 - 1.96\sqrt{\frac{0.2298(0.7702)}{161}} = 0.1648$

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2298 + 1.96\sqrt{\frac{0.2298(0.7702)}{161}} = 0.2948$

The 95% confidence interval for the proportion of sales that occured in December is (0.1648, 0.2948).

More can be learned about the z-distribution at brainly.com/question/25890103

5 0

2 years ago

200 people are asked about three brands of beverages Coffee, Tea and Chocolate. 36 like

Scorpion4ik [409]

Answer:

Step-by-step explanation:

4 0

1 year ago

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Mike walks ½ mile in 30 minutes. What is his unit rate in miles per hour

Mars2501 [29]

Answer:

1 mile per hour

Step-by-step explanation:

you just double it

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2 years ago

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The 1997 a value of an object was $5000. In 2012, it was worth $9500. The annual percent growth has been constant. What is the a

Daniel [21]

<h3>Annual percent growth is 4.37 %</h3>

<em><u>Solution:</u></em>

<em><u>The increasing function is given as:</u></em>

$y = a(1+r)^t$

Where,

y is future value

a is initial value

r is growth rate

t is number of years

From given,

a = 5000

y = 9500

t = 1997 to 2012 = 15 years

r = ?

<em><u>Substituting the values we get,</u></em>

$9500 = 5000(1+r)^{15}\\\\(1+r)^{15} = 1.9\\\\Take\ \frac{1}{15}th\ power\ on\ both\ sides\\\\1+r = (1.9)^{\frac{1}{15}}\\\\1+r = 1.04367\\\\r = 1.04367 - 1\\\\r = 0.04367\\\\In\ percentage,\\\\r = 0.04367 \times 100 \%\\\\r = 4.367 \% \approx 4.37 \%$

Thus annual percent growth is 4.37 %

8 0

2 years ago