Answer:
-17
Step-by-step explanation:
Every number x goes up, the f(x) goes up by 9. -8+9=1 and 1+9=10. Therefore if the number goes down, you subtract. -8-9=-17
325 dollars
find 10% of 39000 3900 then divide it by 12 months which is 325 every month
Answer:-15,20