What is the range of the function y= 3/x-3?

The range is the set of all valid  

y  values.

Interval Notation:  ( − ∞ , − 3 ) ∪ ( -3 , ∞ )

Set-Builder Notation:

{ y | y ≠ − 3 }

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204