All categories

3 years ago

F

Mathematics

1 answer:

Kruka [31]3 years ago

4 0

Answer:

Step-by-step explanation:

Choose the equation that represents the solutions of 0 = 0.25x4 - 8x.

0.25+ (0.25)2 – (4)(1)(-8)

2(1)

-0.25 + (0.25)2 – (4)(1)(-8)

2(1)

8+ (-8)2 – (4)(0.25)(0)

X =

2(0.25)

-8+ (-8)2 – (4)(0.2530

X =

2(0.25)

You might be interested in

A newsgroup is interested in constructing a 90% confidence interval for the proportion of all Americans who are in favor of a ne

Leto [7]

Answer:

The 90% confidence interval for the proportion of all Americans who are in favor of a new Green initiative is (0.6247, 0.6923).

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 z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

Of the 533 randomly selected Americans surveyed, 351 were in favor of the initiative.

This means that $n = 533, \pi = \frac{351}{533} = 0.6585$

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a p-value of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.6585 - 1.645\sqrt{\frac{0.6585*0.3415}{533}} = 0.6247$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.6585 + 1.645\sqrt{\frac{0.6585*0.3415}{533}} = 0.6923$

The 90% confidence interval for the proportion of all Americans who are in favor of a new Green initiative is (0.6247, 0.6923).

6 0

3 years ago

A bag of corn tortilla chips costs 2.89 after a 15% discount. What is the original price?

Montano1993 [528]

Answer:

3.4

Step-by-step explanation:

Let the original price of the bag be = P, the selling price =2.89 after a 15% discount,

Then, Selling price= Original price- Discount on original price

$2.89=P-P(0.15)$

$2.89=P(1-0.15)$

$2.89=0.85P$

$P=\frac{2.89}{0.85}$

$P=3.4$

Thus, the original price was 3.4.

4 0

3 years ago

Read 2 more answers

HELP PLEASE! BRAINLIEST ANSWER! A bag contains a total of 25 marbles. Five of the marbles are blue, 3 are red, 8 are green, and

Andrew [12]

Maybe 50 divided by 25 is 2 so the answer is 2

hope i helped :D : D

4 0

3 years ago

Simplify expression show step by step <br> (-2i)(8i)

TiliK225 [7]

Answer:

Step-by-step explanation:

<u>Remember that $i^2 = -1$ </u>

(-2i)(8i)

$-16i^2$

$-16(-1)$

5 0

3 years ago

Is suic!de a sin or is it not?

Effectus [21]

Yes it is a sin your life matters and god loves you god will take your life away when he wants to if you do subside you go to hell but I just want to let your know that you are loved and I pray that god helps you in any situation you are in the name of Jesus amen

6 0

2 years ago

Read 2 more answers