Answer:
Choice A. 

Step-by-step explanation:
Use graphing calculator
 
        
             
        
        
        
Answer:
a. I'm not sure if there's more to the question but I can't answer without knowing how many is the whole class
B. 12 boys
 
        
             
        
        
        
Answer:
-7a+11
Step-by-step explanation:
 
        
             
        
        
        
14 volunteers will not be able to help.
Step-by-step explanation:
According to given statement;
One booth requires 3 Volunteers.
No. of booths = 16
Given number of volunteers = 62
We will multiply total number of booths with 3 to find the number of volunteers required. 
Volunteers required = No. of booths x 3
Volunteers required = 
Volunteers required = 48
Subtract the required volunteers from total volunteers;

14 volunteers will not be able to help.
Keywords: Subtraction, Multiplication.
Learn more about subtraction at:
#LearnwithBrainly
 
        
             
        
        
        
Solve using system of equations!
Let y=total amount of money and x=hours of overtime. 
mall: y=400+15x
movies: y=360+20x
Solve! Set the equations equal to each other to find x. 
400+15x=360+20x
40=5x
x=8
After 8 hours of overtime the movies would pay her more.