28 equals -2 subtract 5X

x= -6

Step-by-step explanation:

-2- 5x=28

+2        +2

-5x=30

x= -6

Check:

-2 -5 (-6)=28

x=6

Step-by-step explanation:

28 = -2 - 5x

30 = 5x

6 =x

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