Points Al-23) -5-4. and C(2,-1) form triangle ABC on a coordinate plane. What is the area of this triangle in square units

29

100,3

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: i don't understand it

step-by-step explanation: sorry

answer: check all that apply, where the options?

step-by-step explanation:

is there a picture

step-by-step explanation: