Astore is having a sale on chocolate chips and walnuts. for 3 pounds of chocolate chips and 5 pounds of walnuts, the total cost is $ 15 . for 12 pounds of chocolate chips and 2 pounds of walnuts, the total cost is $ 33 . find the cost for each pound of chocolate chips and each pound of walnuts.

c = cost per pound of chocolate chips

w = cost per pound of walnuts.

ok then what happened.

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