What is the contrapositive of the statement?If n is even, then n + 5 is odd. A) If n is even, then n + 5 is odd.
B) If n is odd, then n + 5 is even.
C) If n + 5 is even, then n is odd.
D) If n + 5 is odd, then n is even.

I'm choosing C.

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

x=-7

step-by-step explanation:

x+3=-10

-10+3=-7

x=-7

c

step-by-step explanation: