Which list has three equivalent fractions for 2/5? 6/15, 8/16, 10/25
4/10, 6/20, 10/25
6/15, 8/20, 12/25
4/10, 6/15, 8/20

4/10  ;  6/15 ;  8/20

Step-by-step explanation:

Reduce to simplest form:

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