Hailey has bottles that hold 678 pennies each. about how many pennies does she have if she has 6 bottles filled with pennies?

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

step-by-step explanation:

it's is b