Answer:
![- \frac{18}{ {b}^{4} }](https://tex.z-dn.net/?f=%20-%20%20%5Cfrac%7B18%7D%7B%20%7Bb%7D%5E%7B4%7D%20%7D%20)
Step-by-step explanation:
![- 18b {}^{ - 4}](https://tex.z-dn.net/?f=%20-%2018b%20%7B%7D%5E%7B%20-%204%7D%20)
express b^-4 with a positive exponent using:
![a {}^{ - n} = \frac{1}{ {a}^{n} }](https://tex.z-dn.net/?f=a%20%7B%7D%5E%7B%20-%20n%7D%20%20%3D%20%20%5Cfrac%7B1%7D%7B%20%7Ba%7D%5E%7Bn%7D%20%7D%20)
![- 18 \frac{1}{ {b}^{4} }](https://tex.z-dn.net/?f=%20-%2018%20%5Cfrac%7B1%7D%7B%20%7Bb%7D%5E%7B4%7D%20%7D%20)
![- \frac{18}{ {b}^{4} }](https://tex.z-dn.net/?f=%20-%20%20%5Cfrac%7B18%7D%7B%20%7Bb%7D%5E%7B4%7D%20%7D%20)
I don't think it's proportional, because in order for a question to be a proportional question has/could be to be like this:
Gasoline costs $2.79 per 2 gallon. How much will it cost for 8 gallon. Then, we cross multiply and all to find the answer.
Answer:6
If you were to multiply 6*6*6 you would get 216
(6-x)=24
X=-18
If you subtract a negative number with a positive number it adds them together making it positive (6- -18)=24