Question

ZA and B are supplementary

mZA= 2n and mZB = 3n + 20
Find mZB
Am B = 12
B) mzB = 62
m B= 116
Dm B = 148

Answer 1

< A+< B =180

2n + 3n +20 =180

5n = 160

n = 32

(B= 116 ..........

answer is C