Given a = [-2,7], b = [1,1], and c = [-2,-1], determine a*(b+c)

Answer 1

assuming you mean a•(b+c) that would be
[-2,7]•[1-2,1-1] = [-2,7]•[-1,-2] = (-2)(-1)+(7)(-2) = 2-14 = -12

Answer 2

Ya, sorry.
Thanks though!!