Atriangle is rotated 90° about the origin. which rule describes the transformation? (x, y) → (–x, –y) (x, y) → (–y, x) (x, y) → (–y, –x) (x, y) → (y, –x)

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step-by-step explanation:

10000

step-by-step explanation: divide by 2,

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