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insens350 [35]
2 years ago
6

How to solve this equation?

Mathematics
1 answer:
Korolek [52]2 years ago
6 0
X= -4 that is the answer to x
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Ruby has a bird feeder which is visited by an average of 13 birds every 2 hours during daylight hours. What is the probability t
zalisa [80]

Answer:

62.93%

Step-by-step explanation:

We have to solve it by a Poisson distribution, where:

p (x = n) = e ^ (- l) * l ^ (x) / x!

Where he would come being the number of birds that there would be in 40 minutes, we know that in 2 hours, that is 120 minutes there are 13, therefore in 40 there would be:

l = 13 * 40/120

l = 4,333

Now, we have p (x> 3) and that is equal to:

p (x> 3) = 1 - p (x <= 3)

So, we calculate the probability from 0 to 3:

 p (x = 0) = 2.72 ^ (- 4.33) * 4.33 ^ (0) / 0! = 0.01313

p (x = 1) = 2.72 ^ (- 4.33) * 4.33 ^ (1) / 1! = 0.0568

p (x = 2) = 2.72 ^ (- 4.33) * 4.33 ^ (2) / 2! = 0.12310

p (x = 3) = 2.72 ^ (- 4.33) * 4.33 ^ (3) / 3! = 0.17767

If we add each one:

0.01313 + 0.0568 + 0.12310 + 0.17767 = 0.3707

replacing:

p (x> 3) = 1 - 0.3707

p (x> 3) = 0.6293

Which means that the probability is 62.93%

5 0
3 years ago
If the spinner is spun twice, what is the probability that the numbers that are spun don't match?
Strike441 [17]
Four possible way depending on what you spin if it is dominoes it would be twelve
8 0
2 years ago
SIMPLE CORDINATE PLOTTING! BRAINLIEST, 5 STAR, AND A LIKE ON UR ANSWER. SHOW SOME WORK.
Damm [24]

Answer:

A

Step-by-step explanation:

( 2, -5 )

( -2, -5)

Hope this helps dude

7 0
3 years ago
Read 2 more answers
A cell phone costs $170 and has a tax rate of 7%. Write and Solve a proportion to find how much tax is paid on the cell phone.
Darina [25.2K]

Answer:

The Amount of tax paid on the cell phone is $11.9

Step-by-step explanation:

Given as :

The cost of the cell phone = x = $170

The tax rate of the cell phone = r = 7% of the phone cost

Let The Amount of tax paid on the cell phone = $y

<u>Now, According to question</u>

The Amount of tax paid on the cell phone = 7 % of cost of the cell phone

i.e y = 7% of x

Or, y = \dfrac{7}{100} × x

Or,  y = \dfrac{7}{100} × $170

Or, y = \frac{7\times 170}{100}

∴ y = 7 × 1.7

i.e y = $11.9

So,The Amount of tax paid on the cell phone = y = $11.9

Hence, The Amount of tax paid on the cell phone is $11.9   Answer

4 0
2 years ago
Please Help with 31 and 32. I am really confused. Will Select Brainliest Answer.
EastWind [94]

Answer: C, D

Step-by-step explanation:

31 - use the Pythagorean theorem to find the distance

a^{2} +b^{2} =c^{2}

a = 45

b = 28

plug in values

45^{2} +28^{2} =c^{2} = 2809

c = 53

answer choice C

32 - non linear functions are functions that aren't straight. if a function has anything besides a constant or an x variable to the power of 1, it is not linear

A - this is linear because -18 is a constant

B - this is linear because it only contains constants and an x variable to the power of 1

C - this is linear because it only contains an x variable to the power of 1

D - this is not linear because the x variable is on the bottom of the fraction, so x is to a power of -1

answer choice D

4 0
3 years ago
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