Please help me! The answer options are...
A. 28 in
B. 32 in
C. 21 in
D. 42 in

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

answer: 19 is   2

step-by-step explanation: i just looked at your answer and wrote it down

1) is right

step-by-step explanation:

p = 6s

step-by-step explanation: