Y=72 for the first option,as for the second one i don't know. Hope i helped on the first equation though :)
        
             
        
        
        
Perimeter = 2(L + W)
2(L + 10) = 50
2L + 20 = 50
2L = 30, L = 15
Solution: the length is 15 inches
        
             
        
        
        
Answer:
660
Step-by-step explanation:
Let  A = number of buttons in Box A
and B = number of buttons in Box B
We have two conditions:
(1)            A + B = 1200
(2)       B + 360 = 3(A – 360)     Remove parentheses
           B + 360 = 3A - 1080      Subtract 360 from each side
(3)                 B = 3A - 1440       Substitute (3) into (1)
 A + 3A - 1440 = 1200               Combine like terms
       4A - 1440 = 1200               Add 1440 to each side
                 4A  = 2640               Divide each side by 4
                    A = 660
 
        
             
        
        
        
If the value is 5 and the equation is 
I = 48t 
then
I = 48*5 = 240 
option B