Helppp plz

b, the answer is b

Step-by-step explanation:

i can explain later

ans: x> -9

Step-by-step explanation:

if you multiply

-2x < 18 by -1 than inequality sign changes as

2x > -18

divide both side by 2 to free 2x to x i.e

2x/2 > (-18/2)

so

x> -9

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

true

step-by-step explanation:

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