Use a proportion.
2 adults to 18 students is as x adults to 99 students.
2/18 = x/99
18x = 2 * 99
18x = 198
x = 11
Answer: 11 adults
Answer: Yes, ![\bold{f^{-1}(x)=\dfrac{x+6}{3}}](https://tex.z-dn.net/?f=%5Cbold%7Bf%5E%7B-1%7D%28x%29%3D%5Cdfrac%7Bx%2B6%7D%7B3%7D%7D)
<u>Step-by-step explanation:</u>
f(x) = 3x - 6 is a line so it is a function because
it passes the vertical line test
and the horizontal line test
To find the inverse, swap the x's and y's and solve for y
![y=3x-6\\\\\\\text{Swap the x's and y's:}\qquad x=3y-6\\\\\text{Add 6 to both sides:}\qquad x+6=3y\\\\\text{Divide both sides by 3:}\qquad \dfrac{x+6}{3}=y](https://tex.z-dn.net/?f=y%3D3x-6%5C%5C%5C%5C%5C%5C%5Ctext%7BSwap%20the%20x%27s%20and%20y%27s%3A%7D%5Cqquad%20x%3D3y-6%5C%5C%5C%5C%5Ctext%7BAdd%206%20to%20both%20sides%3A%7D%5Cqquad%20x%2B6%3D3y%5C%5C%5C%5C%5Ctext%7BDivide%20both%20sides%20by%203%3A%7D%5Cqquad%20%5Cdfrac%7Bx%2B6%7D%7B3%7D%3Dy)
Answer:
yes it is true that a linear system of three equations with two variables is inconsistent because when we solve the equations variables can be obtained by only first two equations which are considered first. and third equation is useless.
Answer:
(0,0) it's also the origin.