Answer:
Step-by-step explanation:
I will help you just tell me what grade your in and i will help
 
        
             
        
        
        
N=number of African animals in the zoo;
we suggest this equation:
172=45+n/2
Least common multiple=2
172*2=45*2+n
344=90+n
n=344-90
n=254
Answer: there are 254 African animals in the zoo.
        
             
        
        
        
If there are ten black pens, eight blue pens, and twenty pens in total, then there are 2 red pens. This means that the ratio of red to black is 2:10=1:5. Hope this helps!
        
                    
             
        
        
        
 Answer:
what are the options and is there a picture?
Step-by-step explanation: