<ABC would equal 106
seeing in triangle ABD angle A equals 67 you would multiply that by 2 and then subtract it from 180 to get 46, and then triangle DBC all the angles would equal 60. so then add 46 to 60 to get 106 the measure of <ABC
This is = 4 therefore no property is applied
Answer: 17
21-4=17
4+17=21
21+17=38 and so on..
The students that are correct are Jake , and Liu because 51, and 21 are composite.
Hope this helps!
Cameron would have gotten 182 votes. Sydney would have gotten 547.