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3 years ago

2(x+2)^2-5=8 solve using square roots

Mathematics

1 answer:

dsp733 years ago

7 0

Answer:

x= $\sqrt 26$ /2-2

Step-by-step explanation:

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The bots are on a roll today

antoniya [11.8K]

Answer:

YESSSSS

Step-by-step explanation:

7 0

3 years ago

Hi Guys, I need immediate help with this question however if anyone decides to respond with "I don't know" or answers with somet

kompoz [17]

Answer:

4x²(3x−1)

Step-by-step explanation:

12x³−4x²

=4x²(3x−1) Factor out the greatest common factor of 4x²

5 0

4 years ago

To find the standard deviation of the diameter of wooden dowels, the manufacturer measures 19 randomly selected dowels and find

loris [4]

Answer:

Option D - $[0.12$

Step-by-step explanation:

Given : The manufacturer measures 19 randomly selected dowels and finds the standard deviation of the sample to be s=0.16.

To find : The 95% confidence interval for the population standard deviation sigma?

Solution :

Number of sample n=19

The degree of freedom is Df=n-1=19-1=18

The standard deviation of the sample is s=0.16

Applying chi-square table to find critical value,

Upper critical value of $\chi^2$ is $UC=\chi(\frac{0.05}{2},18) = 31.5264$

Lower critical value of $\chi^2$ is

$LC=\chi(1-\frac{0.05}{2},18) = 8.2307$

Lower limit of the 95% confidence interval for the population variance

$L=\frac{(df)\times (s^2)}{UC}$

$L=\frac{18\times (0.16^2)}{31.5264}$

$L=\frac{18\times0.0256}{31.5264}$

$L=\frac{0.4608}{31.5264}$

$L=0.0146$

Upper limit of the 95% confidence interval for the population variance

$U=\frac{(df)\times(s^2)}{LC}$

$U=\frac{18\times (0.16^2)}{8.2307}$

$U=\frac{18\times0.0256}{8.2307}$

$U=\frac{0.4608}{8.2307}$

$U=0.0559$

So, The 95% confidence interval for the population variance is [0.0146, 0.0560]

Now, The 95% confidence interval for the population standard deviation is

$[\sqrt{0.0146}$

$[0.1208$

or $[0.12$

Therefore, Option D is correct.

The 95% confidence interval for the population standard deviation is $[0.12$

6 0

3 years ago

If a statement is not a tautology, it is a ______

Lerok [7]

self contradiction

I hope this helps. I'm sorry if this incorrect, if it is incorrect, i'm sorry for wasting your time. Peace and love to you.

3 0

3 years ago

Calculate the distance travelled by a bus in 2 hours which moves with the velocity of 22 meter per second

erastovalidia [21]

Answer:

Step-by-step explanation:

<u>distance = velocity x time</u>

where: time = 2 hrs. x 3600 sec / 1 hr

= 7200 secs

velocity = 22 m/s

plugin values into the formula:

distance = 22 m/s x 7200 sec.

= 158,400 m. or 158.4 km

3 0

3 years ago