The answer is C. 
You need you use Pythagoras theorem 2 times to have 2 equations with the same sides i.e. for example a2 + b2 = 81 and a2 - b2 = 9. 
You can do it as you have different triangles but with the same sides. 
 
        
             
        
        
        
Combine like terms... 2s and 4s are like terms so that's 6s 4,2,3 are like terms add that up its 9. So it would look like this 6s+9
        
             
        
        
        
Answer:
48 ≥ 4x + 2y
44 ≥ 2x + 2y
     First, we will look at assembling hours.
"The standard model requires 4 hours to assemble [<em>and</em>] the artisan model requires 2 hours to assemble"
     We also know they have 48 hours per day for assembly, x is standard model and y is artisan model.
48 = 4x + 2y
     Lastly, they do not <em>need</em> to make that many, but they <em>can</em> so we will use greater than or equal to.
48 ≥ 4x + 2y
     Now let us look at finishing hours.
"The standard model requires ... 2 hours for finishing touches. The artisan model requires ... 2 hours for finishing touches."
     We also know they have 44 hours per day for assembly, x is standard model and y is artisan model.
44 = 2x + 2y
     Again, they do not <em>need</em> to make that many, but they <em>can</em> so we will use greater than or equal to.
44 ≥ 2x + 2y
 
        
             
        
        
        
Answer:a
Step-by-step explanation: