Answer:
$6.15
Step-by-step explanation:
30.75×20%
...........................
5w
Add all the w's together and you should get 5w
y= -5-x
-x + 5(-5-x) = -7
-x -25-5x =-7
-x-5x = 25 -7
-6x= 18
x = -3
-3 +y = -5
y= -5 +3
=-2
-(-3) + 5(-2)
3 - 10 = -7
3420/9=380 He used 380 boxes in his first week.
