Let
x-------> the first number
y------> the second number
we know that


equation 

equation 
substitute equation 1 in equation 2

using a graph tool-----> to resolve the second order equation
see the attached figure
the solution is

 
        
                    
             
        
        
        
First simplify the section in the parenthesis. 
-1/6 + 2/3(8 1/4) + -1/2 
Then multiply 2/3 by 8 1/4.
-1/6 + 5 1/2 + -1/2 
Add -1/2 to 5 1/2. 
-1/6 + 5 
Add 5 to -1/6. 
4 5/6 is the fully simplified answer. 
Hope this helps!
        
             
        
        
        
Answer:
option D
Step-by-step explanation:

equation 2:

so we have:

 
        
             
        
        
        
40% are boys. divide 2 by 5 and then multiply by 100
        
                    
             
        
        
        
9514 1404 393
Answer:
   (a)  231°
Step-by-step explanation:
   arc WYZ = arc WX + arc XYZ
   arc WYZ = 51° +180° . . . . . XZ is a diameter, substitute known arc measures
   arc WYZ = 231°