10 cancels out so its 5/3 :) Rate Me plz <span />
Answer:
∠X = 48°
∠Y = 96°
∠Z = 36°
Step-by-step explanation:
All angles of a triangle are equal to 180.
(3.2n) + (6.4n) + (2.4n) = 180
12n = 180
n = 15
Now, we will solve for each angle.
∠X = 48°
3.2n
3.2(15)
48°
∠Y = 96°
6.4n
6.4(15)
96°
∠Z = 36°
2.4n
2.4(15)
36°
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Answer:
The answer is B 93 sq cm
Step-by-step explanation:
In order to find the area, we need to split the figure into two.
Please see the attached image.
<u>Hope this helps :-)</u>
You would do 3/4 of 20.
20 / 4 = 15
15 pens have black ink.
Answer:
And we can find this probability with thie difference:
And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.
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 heights of a population, and for this case we know the distribution for X is given by:
Where
and
We are interested on this probability
And the best way to solve this problem is using the normal standard distribution and the z score given by:
If we apply this formula to our probability we got this:
And we can find this probability with thie difference:
And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.