<span>(r/s)(6) = r(6) / s(6)

= (3*6 - 1) / (2*6 + 1)

= 17/13</span>

75 x 0.88 = 66

75-66=9

9 kilograms is your answer, hope this helps

F(x) = 2x - 10

let y = f(x)

y = 2x - 10 solving for x.

y + 10 = 2x

2x = y + 10

x = (y + 10)/2

Recall f(x) = y. Implies x = f⁻¹(y)

<span>x = (y + 10)/2

</span>

f⁻¹(y) <span>= (y + 10)/2

</span>

So as well:

f⁻¹(x) <span>= (x - 10)/2</span>