Answer:
The fencing Chaz used for the pen is 56.67 feet
Step-by-step explanation:
Fencing interprets to circumference
If the radius of the pen is 9 ft
circumference = 
= 2*(22/7)*9
= 396/7
= 56.67 ft
Answer: -w(2w+7): -2w ^2 - 7w
Step-by-step explanation:
19. (X+5)-3
20. 2a
21.3b
22. 5y-5
23. 1/2n-15