Figure TUVW was translated 4 units left and 5 units up to form figure T'U'V'W'. Figure T'U'V'W' was dilated
using a scale factor of } with a center of dilation at the
origin. The result is figure T'U"V"W", shown on the
coordinate grid below.

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72