6. a surf board rental company charges
$25 for the first hour and $10 for each
additional hour. which equation could be
solved to find the number, x, of
additional hours rented if the total cost of
the rental was $75?
a)25x + 10 = 75
b)25 + 10x = 75
2)75 - 25x = 10
d)25 - 10x = 75

Consider x as the missing number of hours, so 10x + 25(initial hour) and the total of the rental is $75

10x + 25 = $75

Answer

B

ok

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