Answer:
The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.
(
−
∞
,
∞
)   
{x
|
x  ∈  R
}
Hope this helps I'm 80% sure this right.
 
        
             
        
        
        
Answer:
Step-by-step explanation:
 
        
             
        
        
        
Answer:
530.66 mm²
5.3066 cm²
Step-by-step explanation:
A = π·r²
= 3.14×(13mm)²
= 3.14×169mm²
= 530.66 mm²
= 5.3066 cm²
 
        
                    
             
        
        
        
Answer:(x+3)(3x+4) 
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
x = 20
Step-by-step explanation:
The three angles make up a straight line.
A straight line has 180 degrees.
x + 3x + 100 = x80          Combine
4x  +  100 = 180               Subtract 100 from both sides
4x = 180 - 100
4x  = 80                           Divide by 4
x = 80/4
x = 20