Identify the variation as direct, inverse, joint or combined. a1b1/c1=a2b2/c2

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length