Answer:
 B. Stratified random sample is the correct answer
 
        
             
        
        
        
Answer:
-4u+2v = <-6, 34>
Step-by-step explanation:
u = <4, -7) → -4u = <-16, 28>
v = <5, 3> → 2v = <10, 6>
-4u+2v =  <-16, 28> + <10, 6> = <-6, 34>
 
        
             
        
        
        
Divide 6 by -8 to get the variable alone! 
6/-8 < division< equation
        
             
        
        
        
Answer:
E (Y) = 3
Step-by-step explanation:
If a 4-sided die is being rolled repeatedly; and the odd-numbered rolls (1st 3rd,5th, etc.)
The probability of odd number roll will be, p(T) = 
However, on your even-numbered rolls, you are victorious if you get a 3 or 4. Also, the  probability of even number roll, p(U) = 
In order to  calculate: E (Y); We can say Y to be the number of times you roll.
We know that;
E (Y) = E ( Y|T ) p(T) + E ( Y|U ) p(U)
Let us calculate E ( Y|T ) and E ( Y|U )
Y|T ≅ geometric = 
Y|U ≅ geometric = 
also; x ≅ geometric (p)
∴ E (x) =  
 
⇒  = 4 ; also
 = 4 ; also  = 2
 = 2
E (Y) = 4 ×  + 2 ×
 + 2 × 
         = 2+1
E (Y) = 3
 
        
             
        
        
        
Answer:
4.
Step-by-step explanation:
y = -2x + 3
-1 = -2(2) + 3
-1 = -4 + 3
-1 = -1
y = x - 3
-1 = 2 - 3
-1 = -1