Answer:
C=8
Step-by-step explanation:
6c-9d=111
<u>-) 5c-9d=103</u>
6c-5c=c
-9c+9c=0
111-103=8
(Negative+Negative=Positive)
I need Brainliest!
Answer: 89 or 90 degrees.
b
I just did it in my math class and got it right
13.5 or 13 1/2