Answer:
x = ± 13
Step-by-step explanation:
Given
x² = 169 ( take the square root of both sides )
x = ±  = ± 13
 = ± 13
Since 13 × 13 = 169 and - 13× - 13 = 169
 
        
             
        
        
        
11.5 is a rational number
        
                    
             
        
        
        
Answer:
3.7 million
Step-by-step explanation:
14,100,000 = 3,000,000 + 3p
3p = 11,100,000
p = 11,100,000 / 3
p = 3,700,000
 
        
             
        
        
        
If X is the number of hats . . . reading backwards . . . 
Thursday = Wednesday + Tuesday
17 = 1/2 X + 5
Solving:
17 - 5 = 1/2 X
12 = 1/2 X
24 = X
So she had 24 on Monday.