Prices of Books Which amount is the most reasonable approximation of the total price of the 5 books? (options$25.00 $30.00 $35.00 $40.00.) (book prices$6.45 $7.75 $7.99 5.99 6.00)

y/x=18

step-by-step explanation:

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

my guess would be b and d, but i didn’t actually get out the pen and paper. lol