Answer:
Option C is correct
Step-by-step explanation:
![a. - 3, - 12 \\ = 36](https://tex.z-dn.net/?f=a.%20-%203%2C%20-%2012%20%5C%5C%20%20%3D%2036)
![b. - 6, - 6 \\ = 36](https://tex.z-dn.net/?f=b.%20-%206%2C%20-%206%20%5C%5C%20%20%3D%2036)
![c. \: \: 9, - 4 \\ = - 36](https://tex.z-dn.net/?f=c.%20%20%5C%3A%20%5C%3A%209%2C%20-%204%20%5C%5C%20%20%3D%20%20-%2036)
![d. \: \: 2,18 \\ = 36](https://tex.z-dn.net/?f=d.%20%5C%3A%20%20%5C%3A%202%2C18%20%5C%5C%20%20%3D%2036)
<h3>Hope it is helpful...</h3>
This equation shows a perfect square. X = 11
Answer:
78 ml of 7% vinegar and 312 ml of 12% vinegar.
Step-by-step explanation:
Let x represent ml of 7% vinegar brand and y represent ml of 12% vinegar brand.
We have been given that chef wants to make 390 milliliters of the dressing. We can represent this information in an equation as:
![x+y=390...(1)](https://tex.z-dn.net/?f=x%2By%3D390...%281%29)
![y=390-x...(1)](https://tex.z-dn.net/?f=y%3D390-x...%281%29)
We are also told that 1st brand 7% vinegar, so amount of vinegar in x ml would be
.
The second brand contains 12 vinegar, so amount of vinegar in y ml would be
.
We are also told that the chef wants to make 390 milliliters of a dressing that is 11% vinegar. We can represent this information in an equation as:
![0.07x+0.12y=390(0.11)...(2)](https://tex.z-dn.net/?f=0.07x%2B0.12y%3D390%280.11%29...%282%29)
Upon substituting equation (1) in equation (2), we will get:
![0.07x+0.12(390-x)=390(0.11)](https://tex.z-dn.net/?f=0.07x%2B0.12%28390-x%29%3D390%280.11%29)
![0.07x+46.8-0.12x=42.9](https://tex.z-dn.net/?f=0.07x%2B46.8-0.12x%3D42.9)
![-0.05x+46.8=42.9](https://tex.z-dn.net/?f=-0.05x%2B46.8%3D42.9)
![-0.05x+46.8-46.8=42.9-46.8](https://tex.z-dn.net/?f=-0.05x%2B46.8-46.8%3D42.9-46.8)
![-0.05x=-3.9](https://tex.z-dn.net/?f=-0.05x%3D-3.9)
![\frac{-0.05x}{-0.05}=\frac{-3.9}{-0.05}](https://tex.z-dn.net/?f=%5Cfrac%7B-0.05x%7D%7B-0.05%7D%3D%5Cfrac%7B-3.9%7D%7B-0.05%7D)
![x=78](https://tex.z-dn.net/?f=x%3D78)
Therefore, the chef should use 78 ml of the brand that contains 7% vinegar.
Upon substituting
in equation (1), we will get:
![y=390-78](https://tex.z-dn.net/?f=y%3D390-78)
![y=312](https://tex.z-dn.net/?f=y%3D312)
Therefore, the chef should use 312 ml of the brand that contains 12% vinegar.
Answer: B
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
Let's say the surface of the pool is 0, and the diver 4 meters above represents +4, and the diver 5 meters below represents -5. Which number is closer to 0? It's 4! 4 is 4 numbers away from 0, meanwhile 5 is 5 numbers away from zero, 4 is closer to 0!