Answer:
9 < √91 < 10
Step-by-step explanation:
just square everything
 
        
             
        
        
        
First we need to factor the left side. Since it is a perfect square (as is the process with completing the square, we know we can take half of the middle number along with x to be in the two parenthesis. 
(x - 4)(x - 4) = 25
Now we simplify to show it as a square. 
(x - 4)^2 = 25
Next we take the square root of both sides
x - 4 = +/- 5 
Note that we have plus or minus 5. This is because either square would give us positive 25. Now we add 4 to both sides
x = 4 +/- 5
4 + 5 = 9
4 - 5 = -1
 
        
             
        
        
        
Answer:
A
Step-by-step explanation:
Big Brain
 
        
             
        
        
        
Hello :D
To work this out you need to round the numbers to a whole number.
19.9 = 20
5.8 = 6
20 x 6 ≈ 120
I hope this helps :)
 
        
                    
             
        
        
        
13.5·18=243
Base* Hight= Answer