Answer:
x = 10.0
Step-by-step explanation:
Using the geometric mean formula: 
        x                projection
-----------------  =  ---------------
entire base              x
Here, the projection is 5 and the entire base is (20 + 5). So:
        x                5
------------  =  ------------
       25              x
Cross multiply:
x² = 25 (5)
x² = 100
√x² = √100
x = 10
 
        
             
        
        
        
Answer:

Step-by-step explanation:
6 and - 2 are the only two solutions to the required quadratic equation.
So, if the variable is represented by X then (X - 6) and (X + 2) will be the only two factors of the polynomial function.
Therefore, the equation is  
(X - 6)(X + 2) = 0
⇒ 
If the leading coefficient of the equation is 3 then we can write the equation as 
 (Answer)
 
        
             
        
        
        
Answer:
its either 3 or -3 hopefully someone in the comments can tell which
Step-by-step explanation:
 
        
             
        
        
        
Answer:
$1800 at 9% and $1000 at 6%
Step-by-step explanation:
Not needed
 
        
             
        
        
        
Answer:
C≈9.42m
Using any of this formulas
C=2πr
C=2πrd=2r
Solution:
C=πd=π·3≈9.42478m