Find the sum: (x2 + 2x + 3) + (3x2 + x + 1) O A. 4x2 + 3x + 4
B. 4x4 + 4x + 3
C. 4x3 + 3x + 4
D. 3x4 + 4x + 3
SUBMIT

Adam is building a deck in his backyard around a tree. the deck is in the shape of a regular octagon. in the center of the deck, there is a hole for the tree. if a = 10.9 ft, s = 9 ft, and the diameter of the hole is equal to 7 ft, find the area of the deck to the nearest tenth of a square foot. (use 3.14 as an approximation of pi.)