What is 20f -  9 = -18

f= -9/20

Step-by-step explanation:

20f-9=-18

     +9  +9

  20f = -9

       f= -9/20

Hope this helps :)

f = - 9/20

f = - 0.45

Hi there !

20f - 9 = - 18

20f = - 18 + 9

20f = - (18 - 9)

20f = - (9)

f = - 9⁽²/20

f = - 4.5/10

f = - 0.45

Good luck !

8121 because

130,000 divided by 16 is 8121

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