Answer:$590
Step-by-step explanation:
500*6%=30
30*3=90
500+90=590
Answer:

Step-by-step explanation:

Subtract any number from the next one.
-1 - (-6)
4 - (-1)
9 - 4
14 - 9
All of the above subtractions give the same answer.
That answer is the common difference.
I think the answer to your question might be 6