Answer: 4:20 but that simplified would be 1:5 
Triangles to squares
 
        
             
        
        
        
Answer:
s = -2 
Step-by-step explanation:
2(s+2)=4(s+2)
2s + 4 = 4s + 8 
2s - 4s = 8 - 4
-2s + 4 
s = -2 
 
        
                    
             
        
        
        
Answer:
6
Step-by-step explanation:
I used a calculator and the answer is 6
 
        
             
        
        
        
Answer:
5/2
Step-by-step explanation:
2 + 1/2
4/2 + 1/2 = 5/2
 
        
             
        
        
        
Answer:

Step-by-step explanation:
The scientific notation:

We have:

Use

