15 is the answer because 5 is a prime factor so 5 into 105=21 and 3 is another prime factor so 3 into 21=7 and 7 is another so 7 into 7=1 and 5+3+7=15
        
             
        
        
        
Answer:
1,200+300=1,500
Step-by-step explanation:
 
        
                    
             
        
        
        
Can you please complete your question?
        
             
        
        
        
Answer:
55 days or about 7 weeks
Step-by-step explanation:
9(7)= 63              because there are 7 days in one week
63+5=<u><em>68</em></u>
1(7)=7
7+6=<u><em>13</em></u>
68-13=55