Answer:
$14
Step-by-step explanation:
20 x .7 = 14
f(x)=-3(x-1)
Answered would be B.
1) (2i-4)-(6i+9) = 2i-4-6i-9 = -4i-13
2) (-3+8i)+(3-8i) = -3+8i+3-8i = 0+0i = 0