Answer:
3r + 5
Step-by-step explanation:
I hope this helps!
the answer is 42
30-2(-6)
30+12
42
60
AOC= AOB+ BOC
104= 7x+30 +9x+42
104= 16x+72
subtract both sides by 72
104-72=16x
32=16x
divide both sides by 16
x=2
BOC= 9(2) +42
BOC= 60
no , 1 , 3 and 4 are expressions as they don't have an equal sign .
