Answer
5^2 + 12^2 = 25 + 144 = 169 = 13^2
Therefore, it is a right triangle.
Step-by-step explanation:
P = 2(L + W)
P = 58
L = 3W + 1
58 = 2(3W + 1 + W)
58 = 2(4W + 1)
58 = 8W + 2
58 - 2 = 8W
56 = 8W
56/8 = W
7 = W <=== width is 7 inches
L = 3W + 1
L = 3(7) + 1
L = 21 + 1
L = 22 <=== length is 22 inches
A is the answer :) hope I helped
Answer: (no promises this is exactly right)
-2r+6
Step-by-step explanation:
−3r+9+r+−3
=
(−3r+r)+(9+−3)
=
−2r+6
