Choice A is correct
BC=DC
the two triangles share one angel C
the two triangles each have a right angle
so they are congruent according to Angle-Side_Side Theorem 
        
                    
             
        
        
        
Step-by-step explanation:
Given that,
a)
X ~ Bernoulli  and Y ~ Bernoulli
 and Y ~ Bernoulli 
X + Y = Z
The possible value for Z are Z = 0 when X = 0 and Y = 0 
and Z = 1 when X = 0 and Y = 1 or when X = 1 and Y = 0
If X and Y can not be both equal to 1 , then the probability mass function of the random variable Z takes on the value of 0 for any value of Z other than 0 and 1,
Therefore Z is a Bernoulli random variable
b)
If X and Y can not be both equal to  1
then,
 or
 or 
 and
 and 

c)
If both X = 1 and Y = 1 then Z = 2 
The possible values of the random variable Z are 0, 1 and 2.
since a  Bernoulli variable should be take on only values 0 and 1 the random variable Z does not have Bernoulli distribution
 
        
             
        
        
        
If you're familiar with the quadratic equation

well, 

 is the x component of the vertex, in your case, the vertex is the highest point
figure out what t is at the highest point, and then substitute that back into the equation in order to determine height
x=t in this problem
 
        
        
        
Answer:
D
Step-by-step explanation:


 
        
             
        
        
        
Answer:
i don't know that on I not sure what the answer