part a
$800+8x=y
800 is the money the store manager makes a week
8 is how much money the manager makes per every hour that is worked extra
x is the amount of extra hours the manager works
y is the amount of money he makes all together
$11,000 because 10 percent would be that you use extra per one
There are 25 boxes and 15 of them are shaded.
15/25 = 0.6 = 60%