Arecipe for cookies requires 2/3 cup of butter. rama wants to make 3/4 of the recipe. how many cups of butter should rana use to make the cookies?

3/4 x 2/3 = 6/12 = 1/2

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