Can you guys help me with a few questions? What is the length

Nevermind with the second one

You would multiple 500 by .02 to get the amount it would increase each year.
Then multiple that by x to solve for 60.
(the amount)x=60

When a variable drops out of the equation, what are the two
possible solutions that you can get when you try to solve and what do
they mean? Give an example of your own what each answer would
look like.

>>128198
1) You get a function which depends on n-1 variables
2) The variable that was dropped didn't affect the solutions of equation.

1) When you try to solve it you get a hyperplane of a dimension lower by 1 compared to dimension of space original problem
2) You get the same set of solutions as in the original problem.

Let (x_1, ..., x_n) be a vector from [0,1]^n and let
f(x_1, ... x_n)=x_1+x_2+...+(x_n)/(x_n)
So we solve
x_1+x_2+...+(x_n)/(x_n) =0
Of course (x_n)/(x_n)=1, so
x_1+x_2+...+(x_(n-1))/(x_(n-1)) =-1

1) If we drop any variable x_i where i is from 1,...,n-1 then we get a solution that depends on n-2 variables (since x_n is present here).
2) If we drop x_n then we still have solution that depends on n-1 variables (since x_n is present here)


Your question is quite vague.