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Xelga [282]
2 years ago
12

Please help ASAP pleaseeee no links or fake answers

Mathematics
1 answer:
stira [4]2 years ago
6 0
1) 50x30
2) 2000+409
3) 500+800
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A student is running a 3-kilometer race. He runs 1 kilometer every 2 minutes. Select the function that describes his distance fr
Sliva [168]
Total distance: d = 3 km

Minutes run: x

Distance run = (1 km / 2 minutes) * x = (1/2)x

Distance from the finish line = total distance - ditance run = 3 - (1/2)x =

= - (1/2)x + 3

Answer - (1/2)x + 3
8 0
3 years ago
Read 2 more answers
The length of the human pregnancy is not fixed. It is known that it varies according to a distribution which is roughly normal,
fgiga [73]

Answer:

a) Figure attached

b) P(234

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(234

And we can find this probability with this difference:

P(-2

An we know using the graph in part a that this area correspond to 0.95 or 95%

c) P(250

And we can find this probability with this difference:

P(-1

An we know using the graph in part a that this area correspond to 0.95 or 34+34+13.5+2.35%=83.85%

d) P(X

And using the z score we got:

P(X

And that correspond to approximately 0.15%

Step-by-step explanation:

Part a

For this case we can see the figure attached.

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".  

Part b

Let X the random variable that represent the length of human pregnancy of a population, and for this case we know that:

Where \mu=266 and \sigma=16

We are interested on this probability

P(234

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(234

And we can find this probability with this difference:

P(-2

An we know using the graph in part a that this area correspond to 0.95 or 95%

Part c

P(250

And we can find this probability with this difference:

P(-1

An we know using the graph in part a that this area correspond to 0.95 or 34+34+13.5+2.35%=83.85%

Part d

We want this probability:

P(X

And using the z score we got:

P(X

And that correspond to approximately 0.15%

5 0
3 years ago
Subtract<br> (8+7i)-(-2-i)
Ulleksa [173]

Answer: 10+8i

Step-by-step explanation:

To subtract the expressions, you would first need to distribute the -1.

(8+7i)-(-2-i)           [distribute -1]

8+7i+2+i               [combine like terms]

10+8i

Now, we have the subtracted answer 10+8i.

8 0
3 years ago
Given the declaration, where is the value 97 stored in the numbers array? int numbers[]={83, 62, 77, 97, 88};
Zepler [3.9K]
Let me help you!

Ok, so before I give you the answer, which is very simple, I will first show you how to answer questions like this in the future.

In the variable declaration, the array "numbers[]" has been declared as an integer. The values of the array "numbers[]" are: <span>83, 62, 77, 97, 88; respectively, the values are equivalent to: 0, 1, 2, 3, 4 which makes the range of array "numbers[]": 5.

To make it clearer:
</span>numbers[0] = 83
numbers[1] = 62
numbers[2] = 77
numbers[3] = 97 <---- This is what we are looking for!
numbers[4] = 88

*** By the way, when counting the range, we don't start at 1, we start at 0. That's why even if the range is 5, the last value is 4.

Therefore, the answer is: 3 or numbers[3].
3 0
3 years ago
Please solve this question
lianna [129]

Answer:

C

Step-by-step explanation:

Since its a perfecr square root

8 0
2 years ago
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