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Mathematics

2 answers:

alexdok [17]2 years ago

8 0

Answer: Mean = 9.3

Median = 10

Mode = 13

Step-by-step explanation:

The given data : 15, 13, 9, 9, 7, 1, 11, 10, 13, 1, 13

First arrange then in ascending order.

1, 1, 7, 9, 9, 10, 11, 13, 13, 13, 15

Now, $\text{Mean}=\dfrac{\text{Sum}}{\text{Number of observations}}$

$\text{Mean}=\dfrac{102}{11}=9.727\approx9.3$

Since, the number of observations = 11 .....odd number.

Therefore, Median = $\dfrac{11+1}{2}=6^{th}\ term=10$

Mode = Most repeated number = 13

laila [671]2 years ago

7 0

Median ; 1
mean; 9.27
mode; 9

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Geometry math question no Guessing

bearhunter [10]

We can first look into the properties of parallelogram,you can also take reference from the figure above:

-Opposite sides are parallel and are congruent.
-Opposite angles are congruent.
-The diagonals bisect each other.

We can then look into the answer:

A.Opposite angles are congurent.
-This is an correct statement.

B.Diagonals are congruent.
-This is incorrect,although they bisect each other,they do not have the same length.

C.The diagonals are peroendicular to each other.
-This is incorrect as well,not every parallelogram has the angle of 90° in the place where the diagonals bisect each others.

D.The area is equal to the product of two adjacent side-this is not true,to find the area,it have to be base×height.

Therefore the answer is A.

Hope it helps!