Please do it which dimensions can create only one unique triangle?
three angles measuring 75 degrees, 45 degrees, and 50 degrees
three sides measuring 14 m, 11 m, and 18 m
three angles measuring 40 degrees, 50 degrees, and 60 degrees
three sides measuring 3 cm, 4 cm, and 8 cm

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

  the correct choice is marked

step-by-step explanation:

the first two graphs show multiple turning points. the last graphs matches the description in every detail.