Answer:
There are 120 1st graders at Sierra Elementary School this year
Step-by-step explanation:
Let n represent the total number of 1st graders at Sierra Elementary School
Since 45% of all 1st graders at Sierra Elementary School are female students and this year there are 54 female 1st graders, 45% of n is equal to 54
→ n( ) = 54
) = 54
→ 45n = 5400
→ n = 120
 
        
                    
             
        
        
        
Answer:
The above equation has two solution
x = 0 and x = 1
Step-by-step explanation:
[ refer to the attachment ]
 
        
             
        
        
        
Answer:
27
Step-by-step explanation:
180-153=b
b=27