Answer:
Step-by-step explanation:
3x - 3y = 3(x-y)
√100 = 10
so √-100 =
i√10
both angles must add up to 180 so
6x+12+3x+63 must =180
= 9x+75
9x+75=180
-75 -75
9x=105
x=11.66
meaning A is approximately 81.96