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3 years ago

Will Give Brainliest!!!! On Time Limit Hurry Please Wrong answer will be deleted!!

Mathematics

2 answers:

USPshnik [31]3 years ago

5 0

Answer:

x = 2 , − 12

Step-by-step explanation:

Use the formula ( b /2 ) (^)2 in order to create a new term. Solve for x by using this term to complete the square.

LenaWriter [7]3 years ago

3 0

Answer:

x = - 12, x = 2

Step-by-step explanation:

Given

x² + 10x = 24

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(5)x + 25 = 24 + 25

(x + 5)² = 49 ( take the square root of both sides )

x + 5 = ± = ± 7 ( subtract 5 from both sides )

HOPE THIS HELPS

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Dairy cows at large commercial farms often receive

IrinaK [193]

Answer:

a) The 99% confidence interval for the true mean milk production is (26.35 kg/d, 29.65 kg/d).

b) They would need to use a confidence level of 94.52%.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample. So

$M = 2.575*\frac{2.25}{\sqrt{12}} = 1.65$

The lower end of the interval is the mean subtracted by M. So it is 28-1.65 = 26.35 kg/d

The upper end of the interval is the mean added to M. So it is 28 + 1.65 = 29.65 kg/d.

The 99% confidence interval for the true mean milk production is (26.35 kg/d, 29.65 kg/d).

(b) If the farms want the confidence interval to be no wider than 1.25 kg/d, what level of confidence would they need to use?

Now we want to find the value of z when M = 1.25. So:

$1.25 = z*\frac{2.25}{\sqrt{12}}$

$0.6495z = 1.25$

$z = 1.92$ , that has a pvalue of 0.9726.

So the confidence level should be 1 - 2*(1-0.9726) = 0.9452

They would need to use a confidence level of 94.52%.

3 0

3 years ago

Miguel is playing a game in which a box contains four chips with numbers written on them. Two of the chips have the number 1, on

jolli1 [7]

Answer:

See explanation

Step-by-step explanation:

Miguel wins $2 is if he pulls two chips with the number 1.

<u>Probability of winning is: </u>

2/4 * 1/3 = 1/6 as there are 4 chips in total

<u> Probability of loosing is:</u>

1- 1/6 = 5/6

<u>Missing values we found in the step 1, can be populated in the table:</u>

Xi === 2 === -1
P(Xi) === 1/6 === 5/6

<u>Expected Value as per table data:</u>

1/6*2 + 5/6*(-1) = -1/2

Expected value is $1/2 loss each time he plays

To make the game fair, the expected value should be zero.

<u>Then as per the calculation above, let's replace 2, with x, and find its value.</u>

1/6x + 5/6*(-1) = 0
1/6x = 5/6
x= 5

So the amount should be $5 to make the game fair.

6 0

3 years ago

Cual es la raiz cuadrada de 202

bezimeni [28]

Answer:

14.2126704036

Step-by-step explanation:

8 0

3 years ago

Solve for unknown values.

forsale [732]

Firstly, a straight line = 180 degrees.
Based on the statement above, we can create an equation of 180-95 = x
(Which is 85)
Now, we also know that all of the angles in a triangle add up to 180 degrees, so we can create this equation of 180- (85 + 50) = y
(Which is 45)

4 0

3 years ago

A clerk at the butcher shop is six feet tall and wears size 10 shoes. What does<br> he weigh?

VikaD [51]

Answer:

he will weigh 300 lbs.

Step-by-step explanation:

3 0

3 years ago

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