X = 2y
2x + 2y = 24
So if x = 2y that means 2x = 4y. Which means that 2x + 2y = 24 can be written as 4y + 2y = 24. Simplified to 6y = 24. Now we need to get 1y so we divide both sides by 6, 6y/6 = y and 24/6 = 4. so y = 4. so x= 2y can be written as x = 8.
        
             
        
        
        
Answer:
T=76
Step-by-step explanation:
If the formula is T=50+N-40 and N=66 then you just substitute 66 in for N then you have T=50+66-40 where as T=76
 
 
        
             
        
        
        
Assuming a normal distribution  we find the standardized z scores for  a:-
z1 = (80 - 180)  / 25  =  = -100/25  = -4
z2 =  (280-180) / 25  =  4
Required P( -4 < z < 4)  from the tables is  >99.9%
b
z1 = 130-180 / 25 =  -2
z2 =  230-180 / 25  = 2
from tables probability is 2* 0.4773  =  95.46 %
        
             
        
        
        
1/2, because 9/16 is closer to 8/16 which reduces to 1/2. It is not as close to 0/16 (0) or 16/16 (1)