Astudent government organization is selling christmas trees as a fundraiser. on friday, they sold 5 noble fir trees and 3 douglas fir trees for a total of $420.on saturday,12 noble fir trees and 9 douglas fir trees were sold for a total of $1,080.what is the cost per tree for each type?

y do u put "subscirbe to ence" on a app for ppl who need with their work?

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

step-by-step explanation:

yes it represnts a functio, their are not 2 of the same numbers on the both sides