If (x + yi) + (2(x + yi) + 3i) = 9, what is x + yi?
a.
3 − i
b.
-3 + i
c.
-3 − i
d.
3 + i
e.
9 − 3i

Jacob signs up to work for 2 1/2 hours at the school carnival. if each work shift is 3/4 hour, how many shifts will jacob work? (i just want to double check : |, for anybody that responds! : )