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2 years ago

13

Please guys help me out with this question.

1 answer:

Kazeer [188]2 years ago

7 0

The values that make the denominator zero are not in the domain.

x²- 4x - 12 = 0

(x - 6)(x + 2) = 0

Answer: 6, -2

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Jack lists all of the unique random samples of a certain sample size from a population. He then calculates the mean for each of

zimovet [89]

Answer:

In this case Jack is only using a part or sample of the total population, so he is doing a sample standard deviation. When you use the total population you are doing a population standard deviation, otherwise, it’s always going to be the sample standard deviation.

Both deviations have different notations. The notation for this type of standard deviation (the one used by Jack) is:

"n" for the number of observations (lowercase)

"x-bar" for the average of the sample

"s" for the standard deviation

"s^2" for the variance

5 0

2 years ago

How can you solve this math problem <br> 2/7y+5=9

nlexa [21]

2/7y + 5 = 9

Subtract 5 from both sides

2/7y = 4

Multiply both sides by 7

2y = 28

Divide both sides by 2

<em><u>y = 14</u></em>

5 0

3 years ago

Read 2 more answers

What is the area of rhombus ABCD? Enter your answer in the box. Do not round at any steps. put the answer in units²

AlladinOne [14]

Answer:

Therefore the Area of Rhombus ABCD is 36 unit².

Step-by-step explanation:

Given:

ABCD is a Rhombus

A = (-1,0)

B = (5,-3)

C = (-1,-6)

D = (-7 ,-3)

To Find:

Area of Rhombus ABCD = ?

Solution:

We know that Area of Rhombus is given as

$\textrm{Area of Rhombus}=\dfrac{1}{2}\times d_{1}\times d_{2}$

Where ,

d₁ and d₂ are the Diagonals.

We have,

Diagonals as AC and BD,

Using Distance Formula we get

$l(AC) = \sqrt{((x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2} )}$

Substituting coordinates A and C we get

$l(AC) = \sqrt{((-1-(-1))^{2}+(-6-0)^{2} )}=\sqrt{36}\\l(AC)=6\ unit$

Similarly for BD we have,

$l(BD) = \sqrt{((5-(-7))^{2}+(-3-(-3))^{2} )}=\sqrt{144}\\l(BD)=12\ unit$

Now Substituting AC and BD in Formula we get

$\textrm{Area of Rhombus}=\dfrac{1}{2}\times AC\times BD$

$\textrm{Area of Rhombus}=\dfrac{1}{2}\times 6\times 12=36\ unit^{2}$

Therefore the Area of Rhombus ABCD is 36 unit².

6 0

2 years ago

Jason inherited a piece of land from his great-uncle. Owners in the area claim that there is a 45% chance that the land has oil.

Anna [14]

In this case you the probabilities can be multiplied similarly to if you flipped a coin twice. .45 * .80 = .36

5 0

3 years ago

Read 2 more answers

What is the volume of this sphere?

photoshop1234 [79]

Answer:

3052.08

Step-by-step explanation:

We use the volume formula for spheres

$\frac{4}{3}$ πr³

Plug in 9cm for radius and evaluate

$\frac{4}{3}$ π(9)³

$\frac{4}{3}$ π*729

3052.08

6 0

2 years ago