Answer:
es verdad pero 3 nomas puede ser dividido por 3 o 1
Step-by-step explanation:
 
        
             
        
        
        
Answer:
There is a 2.17% probability that a randomly selected person aged 40 years or older is male and jogs.
It would be unusual to randomly select a person aged 40 years or older who is male and jogs.
Step-by-step explanation:
We have these following probabilities.
A 13.9% probability that a randomly selected person aged 40 years or older is a jogger, so  .
.
In addition, there is a 15.6% probability that a randomly selected person aged 40 years or older is male comma given that he or she jogs. I am going to say that P(B) is the probability that is a male.  is the probability that the person is a male, given that he/she jogs. So
 is the probability that the person is a male, given that he/she jogs. So 
The Bayes theorem states that:

In which  is the probability that the person does both thigs, so, in this problem, the probability that a randomly selected person aged 40 years or older is male and jogs.
 is the probability that the person does both thigs, so, in this problem, the probability that a randomly selected person aged 40 years or older is male and jogs.
So

There is a 2.17% probability that a randomly selected person aged 40 years or older is male and jogs.
A probability is unusual when it is smaller than 5%. 
So it would be unusual to randomly select a person aged 40 years or older who is male and jogs.
 
        
             
        
        
        
Answer:
Step-by-step explanation:
Adding and subtracting expressions:
a) M + (5x² -2xy) = 6x² +9xy - y²
                       M = 6x² + 9xy - y² - (5x² - 2xy)
Remove the parenthesis by mulplying each term of 5x² - 2xy by (-1) as (-1) is outside the parenthesis
                            = 6x² + 9xy - y² - 5x² + 2xy
Combine ( add or subtract) like terms.
                            = 6x² - 5x² + 9xy + 2xy - y²
                            = x² + 11xy - y²
Hint: Like terms have same variable with same power.
Here, like terms are (i) 6x² and (-5x²)  (ii) 9xy and 2xy
b)               (3xy - 4y²) - N = x² - 7xy + 8y²
                    3xy - 4y²       = (x² - 7xy + 8y²) + N
3xy - 4y² - (x² - 7xy + 8y²) = N
3xy - 4y² - x² + 7xy - 8y² = N
3xy + 7xy -4y² - 8y² -x²   = N
           10xy -12y²  - x²     = N
Answer: N =  10xy - 12y² -x²