1.55 x10 to the power of 9
            9
1.55x10
should look something like that
        
             
        
        
        
Answer: y≤0
Step-by-step explanation:
Looking at the question, I'm assuming the equation is  .
.
To find the range if this equation, it would be best to know that the graph of a square root looks like. Knowing that x=-5, the graph starts at -5 and then increases slowly to the right. Since there are no restrictions to this equation, the graph goes towards infinity.
 
        
                    
             
        
        
        
Its 9 because it includes f(x)
 
        
             
        
        
        
Answer:
Step-by-step explanation:
 = x - 5 ( x ≥ 3 )
 = x - 5 ( x ≥ 3 ) 
(  )² = ( x - 5 )²
 )² = ( x - 5 )² 
x - 3 = x² - 10x + 25 
x² - 11x + 28 = 0 
(x - 4)(x - 7) = 0 
 = 7
 = 7 
 = 4
 = 4 
Check the answer: 
1). x = 7 
 = 7 - 2
 = 7 - 2 
√4 = 2 
2 = 2 
2). x = 4 
 = 4 - 5
 = 4 - 5 
1 = - 1 (False statement) ⇒ x = 4 is an extraneous solution. 
 
        
             
        
        
        
C. 4x + y = 21
4(3) + 9 = 21 
12 + 9 = 21
21 = 21