Answer:
Step-by-step explanation:
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
3rd graph or C would be correct
Took test on edge
C = 1.35n + 15
6 inches
105÷35=3
3x2=6
