Answer:
25
Step-by-step explanation:
Since y varies inversely with x, the relation between y and x will be:
![y \propto \frac{1}{x}](https://tex.z-dn.net/?f=y%20%5Cpropto%20%5Cfrac%7B1%7D%7Bx%7D)
Introducing the proportionality constant, we can write:
![y = \frac{k}{x}](https://tex.z-dn.net/?f=y%20%3D%20%5Cfrac%7Bk%7D%7Bx%7D)
Using the first set of given values of x and y, we get:
![50=\frac{k}{10}\\\\k = 500](https://tex.z-dn.net/?f=50%3D%5Cfrac%7Bk%7D%7B10%7D%5C%5C%5C%5Ck%20%3D%20500)
This means, the relation between y and x is:
![y = \frac{500}{x}](https://tex.z-dn.net/?f=y%20%3D%20%5Cfrac%7B500%7D%7Bx%7D)
We have to find y if x = 20. Using this value in above equation, we get:
![y=\frac{500}{20} \\\\ y = 25](https://tex.z-dn.net/?f=y%3D%5Cfrac%7B500%7D%7B20%7D%20%5C%5C%5C%5C%20y%20%3D%2025)
Thus y would be 25 if x is 20.
Cross multiply
10 x 9 = 90
3 x k = 3k
make an equality
90 = 3k
divide both sides by 3
90/3 = k
simplify
30 = k
Solution would be: a value or values that make a mathematical sentence true.
What do you mean answer key??
Answer:$2.92
Step-by-step explanation:
$6350.00 x .046=$2.92