1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Oksi-84 [34.3K]
3 years ago
6

Determine the value of b2 - 4ac when: a=0 b=4 C=100

Mathematics
1 answer:
stealth61 [152]3 years ago
5 0

Answer:

8

Step-by-step explanation:

b2 - 4ac

Replace letters with numbers

4(2) - 4(0)(100)

Multiply left to right

8 - 4(0)(100)

8 - 0(100)

8 - 0

Answer - 8

You might be interested in
Which of the following BEST summarizes how to use the multiplication property of equality to isolate the
borishaifa [10]

Answer:

A. divide only on the right side of the equation by 2.

Step-by-step explanation:

I took the test yesterday and I got it hope this helps.

7 0
2 years ago
Write an equation of the line that passes through the pair of points (5, 8) and<br> (9, 16).
SashulF [63]

Answer:

D: y = 2x - 2

Step-by-step explanation:

1. \frac{16-8}{9-5} = 2

2. y = 2x + b

3. Insert the points into the equation: 8 = 10 + b

4. b = -2

5. y = 2x - 2

6 0
2 years ago
Read 2 more answers
In 2002, the mean age of an inmate on death row was 40.7 years with a standard deviation of 9.6 years according to the U.S. Depa
marissa [1.9K]

Answer:

The <em>95% confidence interval</em> for the current mean age of death-row inmates is between 42.23 years and 35.57 years.

Step-by-step explanation:

The <em>confidence interval</em> of the mean is given by the next formula:

\\ \overline{x} \pm z_{1-\frac{\alpha}{2}}\frac{\sigma}{\sqrt{n}} [1]

We already know (according to the U.S. Department of Justice):

  • The (population) standard deviation for this case (mean age of an inmate on death row) has a standard deviation of 9.6 years (\\ \sigma = 9.6years).
  • The number of observations for the sample taken is \\ n = 32.
  • The sample mean, \\ \overline{x} = 38.9 years.

For \\ z_{1-\frac{\alpha}{2}}, we have that \\ \alpha = 0.05. That is, the <em>level of significance</em> \\ \alpha is 1 - 0.95 = 0.05. In this case, then, we have that the <em>z-score</em> corresponding to this case is:

\\ z_{1-\frac{\alpha}{2}} = z_{1-\frac{0.05}{2}} = z_{1-0.025} = z_{0.975}

Consulting a cumulative <em>standard normal table</em>, available on the Internet or in Statistics books, to find the z-score associated to the probability of, \\ P(z, we have that \\ z = 1.96.

Notice that we supposed that the sample is from a population that follows a <em>normal distribution</em>. However, we also have a value for n > 30, and we already know that for this result the sampling distribution for the sample means follows, approximately, a normal distribution with mean, \\ \mu, and standard deviation, \\ \sigma_{\overline{x}} = \frac{\sigma}{\sqrt{n}}.

Having all this information, we can proceed to answer the question.

Constructing the 95% confidence interval for the current mean age of death-row inmates

To construct the 95% confidence interval, we already know that this interval is given by [1]:

\\ \overline{x} \pm z_{1-\frac{\alpha}{2}}\frac{\sigma}{\sqrt{n}}

That is, we have:

\\ \overline{x} = 38.9 years.

\\ z_{1-\frac{\alpha}{2}} = 1.96

\\ \sigma = 9.6 years.

\\ n = 32

Then

\\ 38.9 \pm 1.96*\frac{9.6}{\sqrt{32}}

\\ 38.9 \pm 1.96*\frac{9.6}{5.656854}

\\ 38.9 \pm 1.96*1.697056

\\ 38.9 \pm 3.326229

Therefore, the Upper and Lower limits of the interval are:

Upper limit:

\\ 38.9 + 3.326229

\\ 42.226229 \approx 42.23 years.

Lower limit:

\\ 38.9 - 3.326229

\\ 35.573771 \approx 35.57 years.

In sum, the 95% confidence interval for the current mean age of death-row inmates is between 42.23 years and 35.57 years.

Notice that the "mean age of an inmate on death row was 40.7 years in 2002", and this value is between the limits of the 95% confidence interval obtained. So, according to the random sample under study, it seems that this mean age has not changed.

7 0
3 years ago
The image shown below shows the first 3 stages of a pattern.
alisha [4.7K]

Answer:

A. 44

Step-by-step explanation:

Well, there is something interesting we see in this image. The number of tiles add by 2 every time which makes the 22nd the answer because 2 x 22 is 44

7 0
2 years ago
Read 2 more answers
Fractions greater than 1 ? what's the answer I need help ​
Tcecarenko [31]

Answer:

7/6,

999/2,

123/4

Step-by-step explanation:

As long as the numerator is bigger than the denominator, the fraction will be greater than 1.

8 0
3 years ago
Other questions:
  • WILL MARK BRAINLIEST + 10 POINTS.
    11·1 answer
  • How do you simplify 4:420
    9·1 answer
  • Rashid picked a total of 420 strawberries in 5/6 of an hour write an equation to find how many strawberries Rashid could pick in
    7·1 answer
  • Multiply. Write your answer in simplest form.
    9·2 answers
  • Suppose a 95% confidence interval for μ has been constructed. If it is decided to take a larger sample and to decrease the confi
    13·1 answer
  • Find the greatest common factor of 15x 2 y 3 and -20x 3 yz.
    13·2 answers
  • Use slopes to determine if the lines y= -x/3- 9 and 6x – 2y = -5 are perpendicular.
    6·1 answer
  • Jim drove a total distance of 137,702.4 on a race track. He drove 16 laps, where each lap was the same length. What was the leng
    8·2 answers
  • The mean of four numbers is 59, The numbers are 52, 58, 57, and x. Find the value of x.
    12·1 answer
  • If m/CHF = 106°, then what is m/FHD?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!