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Misha Larkins [42]
3 years ago
6

Help Me With This #Geometry

Mathematics
1 answer:
s344n2d4d5 [400]3 years ago
5 0
Hint #2 is a or b so ya, and 3 is c
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Find the conjugate and product of <br><br>i3 + i7 ​
abruzzese [7]

Answer:

  • Complex conjugate: 2i
  • Product: -2i

5 0
2 years ago
There are 12 balls in a bag. One is blue and one is red. What is the exact probability that the blue ball is drawn first and the
Fiesta28 [93]
<h3>The exact probability that the blue ball is drawn first and the red ball is drawn second is \frac{1}{132}</h3>

<em><u>Solution:</u></em>

<em><u>The probability of an event is given as:</u></em>

Probability = \frac{ \text{ number of favorable outcomes }}{ \text{ total number of possible outcomes }}

Given that,

There are 12 balls in a bag

One is blue and one is red

Favorable outcome = blue ball is drawn first

Favorable outcome = 1

Therefore,

Probability = \frac{1}{12}

Now, without replacement, red ball is drawn second

Therefore,

Total possible outcomes = 12 - 1 = 11

Probability = \frac{1}{11}

<em><u>What is the exact probability that the blue ball is drawn first and the red ball is drawn second?</u></em>

Total\ probability = \frac{1}{12} \times \frac{1}{11} = \frac{1}{132}

Thus the exact probability that the blue ball is drawn first and the red ball is drawn second is \frac{1}{132}

8 0
3 years ago
Select all the correct answers.
alexira [117]

Answer:

first and third and fifth

Step-by-step explanation:

big brain time

5 0
3 years ago
Read 2 more answers
Solve this equation 2(x+3)=x-4​
horrorfan [7]

Answer: The answer is x = -10

5 0
3 years ago
Vail Resorts pays part-time seasonal employees at ski resorts on an hourly basis. At a certain mountain, the hourly rates have a
notsponge [240]

Answer:

z=0.842

And if we solve for a we got

\mu=13.16 +0.842*3=15.69

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the hourly rates of a population, and for this case we know the distribution for X is given by:

X \sim N(\mu,3)  

For this part we want to find a value a, such that we satisfy this condition:

P(X>13.16)=0.20   (a)

P(X   (b)

Both conditions are equivalent on this case. We can use the z score again in order to find the value a.  

As we can see on the figure attached the z value that satisfy the condition with 0.80 of the area on the left and 0.20 of the area on the right it's z=0.842. On this case P(Z<0.842)=0.8 and P(z>0.842)=0.20

If we use condition (b) from previous we have this:

P(X  

P(z

But we know which value of z satisfy the previous equation so then we can do this:

z=0.842

And if we solve for a we got

\mu=13.16 +0.842*3=15.69

3 0
3 years ago
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