How many 9s are in 54??

Lines p and q intersect. find the value of b. show your work. cite any theorems you use.

David must install fencing around a lot that is shaped like a right angle.the side of lot that runs east-west is 200 ft long.the side of the lot runs north-south is 125 ft long.calculate how many feet of fencing he will need to surround the entire lot.

With number 11 ( show how you got the answer)