Complete the explicit formula of the arithmetic sequence a. —11, —3, 5, 13, ...
b. 81, 54, 27, O
c. —5, 13, 31, 49
A=
B=
C=

a. a^n = 8n - 19

b. a^n = 81 - 27(n - 1) = 81 - 27n + 27 = 108 - 27n

c. a^n = -5+18(n-1)

area = length x width

length = 2 x width

32 = 2 x width x width

32 = 2 x width^2

36 = width ^2  

width = 6

length = 12

area is 32

perimeter = 2 x 12 + 2 x 6 = 24 + 12 = 36

step-by-step explanation: