all angles = 180 degrees total
add the ratios: 2 +4 +9 = 15
180/ 15 = 12
12*2 = 24
12*4 = 48
12*9 = 108
108 + 48 + 24 = 180
the three angles are: 24, 48 and 108
The answer is C because she did write associative instead of distributive in step 2 in which made her work error.
E=3(6)^2
3(36)
=108
Therefore E=108
