The ages are consecutive even numbers. 
The youngest child is  (x+3) years old.
Every even number is 2 more than the one before it.
So the three ages are
           (x + 3),  (x + 5),  and  (x + 7).
Their sum is    x+3  +  x+5  +  x+7  =  3x + 15
But we're told that their sum is  42, so we can write
                                              3x + 15 = 42  <== the equation
Subtract 15 from each side:  3x         =  27
Divide each side by  3 :          x         =   9    <== the solution
So the three ages are  12,  14,  and  16.
The oldest child is  16  years old.
        
             
        
        
        
Answer:
The answer is 235.5 :)
Step-by-step explanation:
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
1/4
Step-by-step explanation:
i think you would add 5+4+3 and 2+3+4 and divide them so 9/12 and that makes your probability  which leaves a 3/12 chance non of them are in favour of the book
 
        
             
        
        
        
In 1 and 2, you are asked to find "a" and "b" in the pattern 
  g(x) = a•bˣ
1: selection 2
2: selection 4
3. You want the result of evaluating 4000*(1.06)⁵ ≈ 5352.90, selection 2.
        
             
        
        
        
40.25 you add everything together then multiply by .6