Can someone please help me with#2,#5,and #9?I'm not sure how to find the answer.

You have to substitute a value to the x variable (0,1,2,3, etc) and then solve for the y value and place those points on the graph and make a line outlining each x,y.

Hope this helps :)

Comment if you need more help or if it is wrong :) :)

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

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

you can download it here