
Negative multiply negative = Positive
Negative multiply positive = negative

Thus the answer is -4a + 16b - 12c - 12d.
D. 20/3 I think it’s the answe
Sprry, I don't speak spanish, really wish I could've helped. If anyone reading this knows spanish, please comment and tell me what the question is asking.
Ten thousand your welcome
Answer:
4:15 is the ratio formed by the proportion.