Find the error & explain why it is wrong: Laural had to find the sum for the arithmetic series below. What did she do wrong?
12
(3i - 1)

you forgot an image

step-by-step explanation:

unless if u could do my questions, if not i wouldn't want to

the answer is d on edge

step-by-step explanation:

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