Es
) what is the sum of (2x4 + 5x3 - 8x2 - x + 10) and (8x4 - 4x} + x? - x + 2)?
a)
10x4 + x3 - 9x2 - 2x + 12
10x4 + 9x? - 7x2 - 2x + 12
10x4 + x3 - 9x? +12
d)
10x4 + x3 - 7x2 - 2x + 12
submit

answer: 1) twenty-seven times y

              2) twenty-seven multiplied by y

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