A. 30 sixth graders 
b. 12 sixth graders
c. If the school has 40 students and the total of students is 70, the number of sixth graders is x
d. 36 students
        
             
        
        
        
Answer:

![\rule[225]{225}{2}](https://tex.z-dn.net/?f=%5Crule%5B225%5D%7B225%7D%7B2%7D)
Step-by-step explanation:
Let the number be x.

Dividing both sides by 4,

Subtracting 8 from both sides,

The number is -7.
![\rule[225]{225}{2}](https://tex.z-dn.net/?f=%5Crule%5B225%5D%7B225%7D%7B2%7D)
 
        
                    
             
        
        
        
Answer:
x < 8
Step-by-step explanation:
x= # of hikes
3x +16 =5x 
-3x. -3x 
16=2x 
16/2= 8
2x/2= x 
8=x 
x=8 
check: 
3(8) +16 =5(8) 
24 +16 =40
40=40 ✓
there for at 8 hikes with either deal it would be the same but if you went up a number of hikes for the first option it would only be $43.00 spent in total. but with the second option it would be $45.00.
 
        
             
        
        
        
Answer:
4x - 7
Step-by-step explanation: