All categories

3 years ago

Plz help.....................

Mathematics

1 answer:

sdas [7]3 years ago

8 0

Perfect square trinomial means that the constant term is a perfect square, and the middle term is the sum of it's factors.
Option 1: constant 64 sqrt = 8; 8 + 8 = 16 or -8 + -8 = -16 NO
Option 2: constant 36 sqrt = 6; 6 + 6 = 12 or -6 + -6 = -12 NO
Option 3: constant 64 sqrt = 8; 8 + 8 = 16 or -8 + -8 = -16 YES
(x - 8)^2 is the factored form

You might be interested in

Find the area enclosed by the graphs of x + y = 6 , x − y = 0 , y + 5x = 6 .

LekaFEV [45]

?????????????????????????????????????????????????/

6 0

3 years ago

Which of the following are one dimensional and have infinite length

Alik [6]

I got the one that truck was coming up and

4 0

3 years ago

6.Suppose the Gallup Organization wants to estimate the population proportion of those who think there should be a law that woul

drek231 [11]

Answer:

A sample of $n = (\frac{1.96\sqrt{0.3696*0.6304}}{E})^2$ is needed, in which E is the desired margin of error, as a proportion. If we find a decimal value, we round up to the next whole number.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

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

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is of:

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

In a previous study of 1012 randomly chosen respondents, 374 said that there should be such a law.

This means that $n = 1012, \pi = \frac{374}{1012} = 0.3696$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

How large a sample size is needed to be 95% confident with a margin of error of E?

A sample size of n is needed, and n is found when M = E.

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

$E = 1.96\sqrt{\frac{0.3696*0.6304}{n}}$

$E\sqrt{n} = 1.96\sqrt{0.3696*0.6304}$

$\sqrt{n} = \frac{1.96\sqrt{0.3696*0.6304}}{E}$

$(\sqrt{n})^2 = (\frac{1.96\sqrt{0.3696*0.6304}}{E})^2$

$n = (\frac{1.96\sqrt{0.3696*0.6304}}{E})^2$

A sample of $n = (\frac{1.96\sqrt{0.3696*0.6304}}{E})^2$ is needed, in which E is the desired margin of error, as a proportion. If we find a decimal value, we round up to the next whole number.

4 0

3 years ago

Jordy tried to prove that △ A B E ≅ △ B C D △ABE≅△BCDtriangle, A, B, E, \cong, triangle, B, C, D. A A B B C C D D E E Statement

Arte-miy333 [17]

Answer:

what's the answer

tell

4 0

3 years ago

Read 2 more answers

Jack is buying his neighbor’s plot of land. Jack owns 23 acres. The land he is buying is 15 acres. How many acres will Jack have

Andrews [41]