What is the value of x ? A. 4
B. 8
C. 12
D. 16

16 or 12 but I would go with 12

because 16 just kinda flipped me off a little

Step-by-step explanation:

a: 1/6, j: 1/4

step-by-step explanation: you are welcome

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