All The oranges would cost 90.00 dollars because 9x10=90 so there's you're answer
Answer:
15i+15
Step-by-step explanation:
(6+3i)(3+i)
18+9i+6i+3i^2
18+15i+3(-1)
18+15i-3
15i+15
Step 1: Subtract
from both sides. Leaving us with 
Step 2: Add
to both sides. Leaving us with 
So, your answer would be y = -3x