A local hamburger shop sold a combined total 617 of hamburgers and cheeseburgers on Monday. There were 67 more cheeseburgers sold than hamburgers. How many hamburgers were sold on Monday?

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

the answer should be a. snail

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

hope i

-lavira : )