he divided each rectangle in 12 identical parts
for the first rectangle he shaded 1/3 of 12 = 4 parts 
for the second rectangle he shaded 1/4 of 12= 3 parts
so 12= 3*4 leads to a minimum of 12 parts 
:) 
 
        
             
        
        
        
Converting all to improper fractions
31/10s = 31/5
5×31s=31×10 
155s = 310
s=310/155= 2 
20/9=-4/5m
5×20=-4×9m
100=-36m 
m=100/-36 = 72 28/36 = 72 7/9
-14/5=-7/2n 
-14×2=5×-7n 
-28=-35n 
n =-28/-35
n=28/35
        
             
        
        
        
Answer:
32.0 cm
Step-by-step explanation:
volume of a hemisphere = (2/3)πr3 
r = cube root (Volume * 3/2 * 1/π )
r = cube root ( 8514 * 3/2 * 1/π)
r = 15.96
in the nearest tenth r = 16.0 cm
D= 2r
D= 2(16)
D= 32cm
 
        
                    
             
        
        
        
Answer: No! This is not a function!
Step-by-step explanation: 
Functions. Terms. Domain - The set of all inputs of a relation or function. Function - A relation in which each input has only one output. Often denoted f (x). Horizontal Line Test - If every horizontal line you can draw passes through only 1 point, x is a function of y.
 
        
                    
             
        
        
        
Answer:
1)247 + 211 = 458
2)458 - 211 = 247
Step-by-step explanation: