Together juanita and mark can make preperations to cater a dinner in 7 hours. alone juanita can do the job 2 hours faster than mark. find the time each person takes to prepare a meal

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

answer: i ! the answer is   9000 seconds, also d

hope i

-lavira : )

any of them that add up to 180 degrees.