9) Robert bought 3 pound of grapes and
divided them into 6 equal portions. What
is the weight of each portion?

.5 pounds

Step-by-step explanation:

3 divided by 6  is .5

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

i'm not entirely sure

step-by-step explanation:

if you ask home depot or lowe's they might be able to you out