Answer:
116
Explanation:
so to find angle bcs we need to find x and to find x we need to create an equation. 160= angle scd +anglebcs so we do 180=3x+17+12x+8 and solve for x
160=3x+17+12x+8
step 1 combine like terms
160=15x+25
step 2 subtract 25 from each side
135=15x
step 3 divide each side by 15
9=x
then we plug in 9 to 12x+8 and get 116