Which expression is equivalent to 8 x - 12 y + 32?
16 (0.5 x - 4 y + 32)
16 (0.5 x - 0.75 y + 32)
16 (0.5 x - 0.75 y + 2)
16 (0.5 x + 4 y + 2)

C, the third equation, or 16 (0.5 x - 0.75 y + 2)

Step-by-step explanation:

You try expanding each of these and only the third equation works.

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