Answer:
f. sqrt 7 meters
Step-by-step explanation:
we use Pythagoras' theorem here,
let the unknown side be x,
therefore, 
=> 3² + x² = 4²
=> x² = 16 - 9
=> x = √7 m 
 
        
                    
             
        
        
        
y = 3(x + 4)^2 + 31
Step-by-step explanation:
We can convert the given quadratic equation into its vertex form by completing the square:
y = 3x^2 + 24x + 43
 = 3(x^2 + 8x) + 43
 = 3(x^2 + 8x + 4) + 31
 = 3(x + 4)^2 + 31
This is the vertex form of the given quadratic equation with (-4, 31) as its vertex
 
        
             
        
        
        
Answer: an equation that has one term which is nameless and squared also no term which gets raised to higher power. 
Step-by-step explanation:
 
        
             
        
        
        
Solve for x over the real numbers:
-x^2 - 12 = -87
Add 12 to both sides:
-x^2 = -75
Multiply both sides by -1:
x^2 = 75
Take the square root of both sides:
Answer:  x = 5 sqrt(3) or x = -5 sqrt(3)  both Answers are correct
        
             
        
        
        
Answer:
25.56 is the surface area of the pool.
Hope this helps! :)