Answer:
21
Step-by-step explanation:
Yes, polygons are always plane figures
Answer:
87/3
Step-by-step explanation:
Here we are given the expression:

Now we have to find the value of this expression when x equals 9.
So plugging the value of x as -9 in the given expression:


=87/3
So on evaluating we get the value of expression as 87/3.
I am sure it B hope I helped