ANSWER
a. d+4
b. 4d+16
EXPLANATION
The area of the square coaster is represented by:
![{d}^{2} + 8d + 16](https://tex.z-dn.net/?f=%20%7Bd%7D%5E%7B2%7D%20%20%2B%208d%20%2B%2016)
We split the middle term to obtain,
![{d}^{2} + 4d + 4d + 16](https://tex.z-dn.net/?f=%20%7Bd%7D%5E%7B2%7D%20%20%2B%204d%20%2B%204d%20%2B%2016)
We factor by grouping to get,
![d(d + 4) + 4(d + 4)](https://tex.z-dn.net/?f=d%28d%20%2B%204%29%20%2B%204%28d%20%2B%204%29)
![(d + 4)(d + 4) = {(d + 4)}^{2}](https://tex.z-dn.net/?f=%28d%20%2B%204%29%28d%20%2B%204%29%20%3D%20%20%7B%28d%20%2B%204%29%7D%5E%7B2%7D%20)
Since area of a square is l² , it means the side length of the square is
![l = d + 4](https://tex.z-dn.net/?f=l%20%3D%20d%20%2B%204)
b) The perimeter of a square is given by
![P=4l](https://tex.z-dn.net/?f=P%3D4l)
We substitute the length in terms of d, to obtain;
![P=4(d + 4)](https://tex.z-dn.net/?f=P%3D4%28d%20%2B%204%29)
Or
![P=4d + 16](https://tex.z-dn.net/?f=P%3D4d%20%2B%2016)
Answer:
20 degrees
Step-by-step explanation:
180-120-40=20
Answer: 8, 21, 34, 47, 60...
Difference is 13 I added 13 each time.
the answer is 5 i think lol
lol sommet i would do lol but i didnt ahaha
Answer:
follow steps below --------------------------------------(down arrow)
Step-by-step explanation:
to work out the surface area you would do
base times height
length times width
height times width then add all together