Answer:
21.70
Step-by-step explanation:
First find the discount
31 * 30%
31 *.30
9.3
Subtract from the original amount
31 - 9.3
21.70
Here’s the link to the answer
Answer:

Step-by-step explanation:

Answer:
It can be a factor if you have f(-1) = 0
That's binomial theorem as I remember.
Answer: I believe its obtuse
Step-by-step explanation: