$21 because 3$x$7(numbers of days in a week)is $21. I hope this helps :)
        
             
        
        
        
Step-by-step explanation:
substitute a with 2 and b with 3
2x+3
because it's the same equation it should just be an equal sign.
 
        
                    
             
        
        
        
Answer:
True
Step-by-step explanation:
3:7 is girls to boys, and to find the total, do 7+3. After that, you'd get 10, and the ratio would be 3:10, so TRUE
 
        
             
        
        
        
Answer:
idk
Step-by-step explanation:
 
        
             
        
        
        
Answer:
y = x + 8
Step-by-step explanation:
y = mx + b
m = (y2 - y1)/(x2 - x1) = (12 - 2)/(4 - (-6)) = 10/10 = 1
y = x + b
Use point (4, 12).
12 = 4 + b
b = 8
y = x + 8