Based on the description of the scenario, which of the variables is the dependent variable? Along which axis is the dependent variable traditionally plotted?

Restrictions on f(x) = 1/x+5 and g(x) = x-2

Kylie explained that (-4x+9)^2 will result in a difference of squares because (-4x+9)^2 (-4x+9)^2 =(-4x)^2+(9)^2=16x^2+81

Me! last question, and i'm stuck! write the algebraic expression that models the word phrase. the product of 2 divided by the number h and 8 more than the number k