Answer:
6:1
Step-by-step explanation:
 
        
             
        
        
        
Answer:
a) -3/13 
b) -1/8
Step-by-step explanation:
a)  - (21 / 7) / (91 / 7) = 3/13
b) (32 / 32 ) / - (256 / 32) = -1/8
 
        
             
        
        
        
Answer:
9:15
Step-by-step explanation:

 
        
             
        
        
        
Answer:
5.5296
Step-by-step explanation:
to evaluate the expression 4x^4 y^3 we would substitute the value of x and y into it and evaluate. since x = 1/5 and y = 6
4x^4 y^3 
4 × x^4 × 4× y³
 4 × (1/5)∧4 × 4 × 6³
4× (0.2)∧4 × 4 × 216
4 × 0.0016 × 864
0.0064 × 864
5.5296