Word problem CARS Write and solve an equation to find the number of miles you must drive to have the same cost for each of the car rentals.

car 1
$15 plus $0.50 per mile

car 2
$25 plus $0 25 per mile

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

51840000 cm 2

step-by-step explanation: