Answer:
23 years old
Step-by-step explanation:
Let x = age of younger sibling.
Then, the age of the older sibling is x + 9.
x + x + 9 = 55
2x = 46
x = 23
Answer: 23 years old
 
        
                    
             
        
        
        
9514 1404 393
Answer:
   (x, y) = (-6, 15) and (2, -1)
Step-by-step explanation:
You can start by subtracting the second equation from the first.
   (y) -(y) = (x^2 +2x -9) -(-2x +3)
   0 = x^2 +4x -12 . . . . . . collect terms
   0 = (x +6)(x -2) . . . . . . . factor
Solutions for x are -6 and +2. These values make the factors zero.
The corresponding solutions for y are ...
   y = -2(-6) +3 = 15
   y = -2(2) +3 = -1
Solutions to the system of equations are ...
   (x, y) = (-6, 15) and (2, -1)
 
        
             
        
        
        
Answer:
$13.67 - $11.50
So the raise over 7 years was $2.17
So to find the annual raise in the wage:
$2.17 / 7 = 0.31
His wage was raised <u>.31 every year</u>.
 
        
             
        
        
        
The chance of a point landing in that region is 12.5%