Their common denominator is 15. Hope it helps! :) If you could vote my answer as the brainliest, that would be awesome! :)
Answer:
4)
Step-by-step explanation:
the answer to seven less than a number is 4)
Step-by-step explanation:
6)

7)

8)


9)

Out of the 3 choices, I’d say it’s C.
180 degrees because 180 degrees means a straight line and it’s not close to 90, a right angle. It seems like a closer angle to a straight line.