A pure substance that is made of only one kind of atom is called an element. 
An element is a pure substance, which means it is made up of only ONE kind of atom. 
        
                    
             
        
        
        
8 x 5 = 40
40 x 18 = 720
Hope this helps!
        
                    
             
        
        
        

The given triangles are similar by ~ 
 
        
             
        
        
        
Since the square root of a negative number is not a real number, then a negative radical will result in no real solution.
 
        
             
        
        
        
Answer:
3/2 or 1 1/2
Step-by-step explanation:
5÷3 1/3
5/1 ÷ 10/3 because you have to get it into an improper fraction form in order to divide
5/1 × 3/10 because you have to multiply the first number by the reciprocal
5  and 10 cancel out so you would have 2 at the bottom
3/2 or 1 1/2