The difference of six and a number is greater than nine.

x - 6 > 9

Step-by-step explanation:

Let "a number" = x

"The difference of six and a number" = x - 6

"greater than" = >

"nine" = 9

Put the sentence together: x - 6 > 9

x - 6 > 9 is your answer.

~

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