Answer:
Executive branch
Step-by-step explanation:
I think this is right and get point
TAKE 10 ON THE OTHER SIDE 10 IS MULTIPLYING WITH n HENCE WHEN IT GOES TO OTHER SIDE IT WILL UNDERGO DIVISION
-20/10<n (or equal to)
-2<n
Given :
An alloy is a mixture of metals. Suppose that a certain alloy is made by mixing 50 g of an alloy containing 12% copper with 78 g of an alloy containing 92% copper.
To Find :
How many grams of copper are in the resulting mixture what percentage of the resulting mixture is copper.
Solution :
Mass of copper in 50 gm alloy =
.
Mass of copper in 78 gm alloy =
.
Total mass of copper, ( 6 + 76.44 ) gm = 82.44 gram.
Percentage of copper in resulting mixture :
![\%=\dfrac{82.44}{50+78}\\\\\%=64.4\ \%](https://tex.z-dn.net/?f=%5C%25%3D%5Cdfrac%7B82.44%7D%7B50%2B78%7D%5C%5C%5C%5C%5C%25%3D64.4%5C%20%5C%25)
Hence, this is the required solution.
Answer: 8.9 units (choice C)
Explanation:
We plug
into the distance formula to get the following
![d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}\\\\d = \sqrt{(7-(-1))^2 + (-1-3)^2}\\\\d = \sqrt{(7+1)^2 + (-1-3)^2}\\\\d = \sqrt{(8)^2 + (-4)^2}\\\\d = \sqrt{64 + 16}\\\\d = \sqrt{80}\\\\d \approx 8.94427\\\\d \approx 8.9\\\\](https://tex.z-dn.net/?f=d%20%3D%20%5Csqrt%7B%28x_1%20-%20x_2%29%5E2%20%2B%20%28y_1%20-%20y_2%29%5E2%7D%5C%5C%5C%5Cd%20%3D%20%5Csqrt%7B%287-%28-1%29%29%5E2%20%2B%20%28-1-3%29%5E2%7D%5C%5C%5C%5Cd%20%3D%20%5Csqrt%7B%287%2B1%29%5E2%20%2B%20%28-1-3%29%5E2%7D%5C%5C%5C%5Cd%20%3D%20%5Csqrt%7B%288%29%5E2%20%2B%20%28-4%29%5E2%7D%5C%5C%5C%5Cd%20%3D%20%5Csqrt%7B64%20%2B%2016%7D%5C%5C%5C%5Cd%20%3D%20%5Csqrt%7B80%7D%5C%5C%5C%5Cd%20%5Capprox%208.94427%5C%5C%5C%5Cd%20%5Capprox%208.9%5C%5C%5C%5C)