Answer: whats the question here if you wanna know how many boys there are there should be 12
Step-by-step explanation:
 
        
             
        
        
        
Divide 7 into 5 to find each penny value. 
7/5 = 1.4 
Thus, 1 penny is equal to 1.4 mm
100/1.4 = 71.43
Therefore 71.43 pennies is equal to 100mm.
        
                    
             
        
        
        
Answer:
30 pounds
Step-by-step explanation:
Amount of tin in first alloy + amount of tin in second alloy = amount of tin in mixture
0.15 (20) + 0.10 x = 0.12 (20 + x)
3 + 0.10 x = 2.4 + 0.12 x
0.6 = 0.02 x
x = 30
 
        
             
        
        
        
ooh nice answer bud Answer:
Step-by-step explanation:
Answer:
Step-by-step explanation: