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liq [111]
3 years ago
9

Research was done to study the facial expressions of people, since facial expression clearly shows the emotional state of a pers

on. Researchers found that people who smiled a lot lived longer than those who didn't smile much.
Which statement can be inferred from the passage?


Smiling prolongs human life.



Smiling is associated with human longevity.



Smiling decreases a person's life span.



There is no link between smiling and human longevity.
Mathematics
2 answers:
finlep [7]3 years ago
8 0
B 

<span>A is wrong because you can't infer a cause and effect relationship between smiling and long life (other factors might be at work) </span>

<span>C and D are clearly wrong

</span>
Andrej [43]3 years ago
8 0

<em>Mark Me Brainliest !</em>

Question :

Which statement can be inferred from the passage?

Answer:

A.  Smiling prolongs human life.

<em> B [ Smiling is associated with human longevity ]</em>

C.  Smiling decreases a person's life span.

D.  There is no link between smiling and human longevity.


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Select the most specific name for the quadrilateral shown​
JulsSmile [24]

Answer:

its a square

Step-by-step explanation:

its all sides are equal so its a square

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Find all of the eigenvalues λ of the matrix A. (Hint: Use the method of Example 4.5 of finding the solutions to the equation 0 =
Svetradugi [14.3K]

Answer:

\lambda=8,\ \lambda=-5

Step-by-step explanation:

<u>Eigenvalues of a Matrix</u>

Given a matrix A, the eigenvalues of A, called \lambda are scalars who comply with the relation:

det(A-\lambda I)=0

Where I is the identity matrix

I=\left[\begin{array}{cc}1&0\\0&1\end{array}\right]

The matrix is given as

A=\left[\begin{array}{cc}3&5\\8&0\end{array}\right]

Set up the equation to solve

det\left(\left[\begin{array}{cc}3&5\\8&0\end{array}\right]-\left[\begin{array}{cc}\lambda&0\\0&\lambda \end{array}\right]\right)=0

Expanding the determinant

det\left(\left[\begin{array}{cc}3-\lambda&5\\8&-\lambda\end{array}\right]\right)=0

(3-\lambda)(-\lambda)-40=0

Operating Rearranging

\lambda^2-3\lambda-40=0

Factoring

(\lambda-8)(\lambda+5)=0

Solving, we have the eigenvalues

\boxed{\lambda=8,\ \lambda=-5}

8 0
3 years ago
What is the definition of an irrational number?
lianna [129]
A real number that cannot be expressed as a ratio of integers.
3 0
3 years ago
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Which statement is true for the equation 4n – 3 = 4n – 2 Select one: a. It has no solution. b. It has one solution. c. It has tw
oksian1 [2.3K]
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-3=-2 

Since -3!=-2, there is no solution.

So your answer is a.
7 0
3 years ago
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From a pool of 12 candidates, the offices of president, vice-president, secretary, and treasurer will be filled. In how many dif
Romashka [77]

Answer:

11,880 different ways.

Step-by-step explanation:

We have been given that from a pool of 12 candidates, the offices of president, vice-president, secretary, and treasurer will be filled. We are asked to find the number of ways in which the offices can be filled.

We will use permutations for solve our given problem.

^nP_r=\frac{n!}{(n-r)!}, where,

n = Number of total items,  

r = Items being chosen at a time.        

For our given scenario n=12 and r=4.

^{12}P_4=\frac{12!}{(12-4)!}

^{12}P_4=\frac{12!}{8!}

^{12}P_4=\frac{12*11*10*9*8!}{8!}

^{12}P_4=12*11*10*9

^{12}P_4=11,880

Therefore, offices can be filled in 11,880 different ways.

     

   

3 0
4 years ago
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