Elga's age = x
Alvin's age = x + 7
x + x + 7 = 97.
Simplify the left side of the equation
2x + 7 = 97.
Subtract 7 from each side
2x = 90.
Divide each side by 2
x = 45
Since x is equal to Elga's age, Elga is 45 years old
 
        
             
        
        
        
Answer:
area of this circle: 490.6 inch²
Step-by-step explanation:
area of circle: π(radius)²
Here the diameter is given 25 inch, so the radius will be half: 25/2 → 12.5 in
using the formula:
3.14(12.5)²
490.625 inch²
490.6 inch²____rounded to nearest tenth.
 
        
                    
             
        
        
        
Answer:
The  value is  
Step-by-step explanation:
From the question we are told that 
    The  number of times  is  n  =  20  
    The probability of getting three or more heads in a row is  
 
    The probability of getting three or more heads in a row or three or more tails in a row is    
Generally given that it is a fair coin , then   
 Here  P(T) is  probability of getting three or more tails  in a row 
Generally  the probability of getting three or more heads in a row and three or more tails in a row is mathematically represented as 
         
=>   
 =>   
   
 
        
             
        
        
        
Answer:
Step-by-step explanation:
Well 7 is the only number that can be divided by itself and 1
 
        
                    
             
        
        
        
Answer:
OD. x=-3, y=26
Step-by-step explanation:
hope it helps