Which are the solutions of the quadratic equation ? x ^ 2 = - 5x - 3 - 5, 0 (- 5 - sqrt(13))/2, (- 5 + sqrt(13))/2 (5 - sqrt(13))/2, (5 + sqrt(13))/2 5, 0

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

what i would say the best answer is a. 40.5

believe it or not anna is correct good job anna give me a fist bump there u go gal