1 1/2 plus 3/4 equal 9/4, and 9/4 divided by 1/8 equal 18.
16 fluid ounces are equivalent to 2 cups. 8 fluid ounces is one cup, 16/8=2 cups.
Using the perimeter of a rectangle, it is found that she can make a deck of 122 ft wide.
<h3>What is the perimeter of a rectangle?</h3>
The perimeter of a rectangle of length l and width w is given by:
![P = 2(l + w)](https://tex.z-dn.net/?f=P%20%3D%202%28l%20%2B%20w%29)
In this problem:
- She has enough wood to build a deck that is 280ft, hence P = 280.
- The length is of 10 feet, hence l = 10.
- Considering that the deck's width will be added to the actual width of 8 feet, we have that w = 8 + w.
Then:
![P = 2(l + w)](https://tex.z-dn.net/?f=P%20%3D%202%28l%20%2B%20w%29)
![280 = 2(10 + 8 + w)](https://tex.z-dn.net/?f=280%20%3D%202%2810%20%2B%208%20%2B%20w%29)
![36 + 2w = 280](https://tex.z-dn.net/?f=36%20%2B%202w%20%3D%20280)
![2w = 244](https://tex.z-dn.net/?f=2w%20%3D%20244)
![w = \frac{144}{2}](https://tex.z-dn.net/?f=w%20%3D%20%5Cfrac%7B144%7D%7B2%7D)
![w = 122](https://tex.z-dn.net/?f=w%20%3D%20122)
She can make a deck of 122 ft wide.
You can learn more about the perimeter of a rectangle at brainly.com/question/10489198
The answer is 12.
First you multiply 8 by 5, which gives you 40. Then, you divide 40 by 2, which gives you 20.
Finally, you subtract 20 by 8 because 5 + 3 = 8.