6/7 divided by 3 help meh fast

    6

   21

Step-by-step explanation:

 6                6

  =  

7x3              21

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

(a) the volume of the cone is 20/3 in3

hence, option a is correct.