20 because when you divide 12 by 3/5 you get 20 use a calculator
Answer:
x=8.5
Step-by-step explanation:
∠AOC=68
∠COD= (2x+5)
∠AOC and ∠COD are complimentary angles. This means that when you add them together you get 90.
∠AOC + ∠COD = 90
68 + (2x+5) =90
2x+5=22
2x=17
x=8.5
C- 8
D- 8i
E- 11
Those are all the ones I know, mark as brainliest pls :)