Which number is a factor of 20,but not a multiple of 2. and how do i show my work. this is for my fourth grader

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

they go with it happens or they mite give a chance?

step-by-step explanation:

just keep asking questions until you have a better understanding.

step-by-step explanation: