How many lines of symmetry does the design have? How many degrees does the design need to be rotated to match itself? (Hint: See the polygons at the start of the lesson.) How did you decide to color your design? What patterns do you see in your design?

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

where r the answers

step-by-step explanation:

pi x^2

step-by-step explanation:

pi times x squared