Which statements are true about the graph of y < x + 1? check all that apply. the slope of the line is 1. the line is solid. the area below the line is shaded. a solution to the inequality is (2, 3). the x-intercept of the boundary line is (, 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