Answer: 
Step-by-step explanation:
1. By definition, an inverse variaton is a relationship between two variables:
- When of them increases, the other one decreases.
- When one of them decreases, the other one increases.
2. An inverse variation has the following form:
(
is inversely proportional to 
)
Where 
is a nonzero constant.
3. The option that has the form shown above is:
Where 
is the nonzero constant.
Hey there
just divide 18.5 by 100
you will get some number of cups per 1 serving
We have 2l + 2w = 120 and l/w = 2/3;
Then, l = (2/3)w;
Finally, (4/3)w + 2w = 120;
4w + 6w = 360;
10w = 360;
w = 36;
l = (2/3)x36;
l = 24;
x+ y = 96 → y = 96 - x (1)
And the price per plain cake * the number he sold + price of the decorated cake * the number he sold = total sales
So
8x + 12y = 800 (2)
Subbing (1) into (2), we have that
8x + 12 (96 - x) = 800 simplify
8x + 1152 - 12x = 800
-4x + 1152 = 800 subtract 1152 from both sides
-4x = -352 divide both sides by -4
x = 88 = the number of plain cakes he sold
And 96 - x = 96 - 88 = 8 = the number of decorated cakes he sold
