I'm on a quiz and I really need help on it. Could someone help me out?

c

i dont think it right

Step-by-step explanation:

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180

i would say c is the best answer, hope it's right!

good luck! =)

cutie~