Unit rate if your finding how much one cost.
        
             
        
        
        
How to get answer by Mimiwhatsup:

 
        
             
        
        
        
Is it SV squared? Or times 2
        
             
        
        
        
Answer:
A:  W = 8x
B:  12y + 320
C:  44
Step-by-step explanation:
A:  Lana can make $8 an hour.
W = 8x
B:  She makes $12 per hour for every hour of overtime.  This means that she already worked 40 hours with regular pay.  She has already made $320.
40 × $8 = $320
S = 12y + 320
C:  Plug in the amount Lana earned into the second equation.  The second equation will account for pay from both regular and overtime hours.
S = 12y + 320
368 = 12y + 320
368 - 320 = (12y + 320) - 320
48 = 12y
48/12 = (12y)/12
4 = y 
y = 4
Lana worked 4 hours of overtime and 40 hours of regular hours.  In total, she worked 44 hours.
4 + 40 = 44