Answer:
Height of the 12 cases will be =
inches.
Step-by-step explanation:
Thickness of each DVD storage case =
inches
Let number of DVD storage cases sold = x
Therefore, the height of cases sold will be represented by the expression 
If the number of cases sold x = 12
So the height of the cases sold will be =
inches
=
inches
Therefore, the answer is
inches.
All you have to do is substitute 2 and 7 in for x in the function.
f(2) = 2(2) + 7
= 11
f(7) = 2(7) + 7
= 21
Multiply 912 x 512 x 3 = ? then divide your answer by 12 .
You would subtract y on both sides so z-y then you get x=x. I think I hope this helps.