Ahmad = 1/6
Barry = 1/2
Tara = 1 - 1/6 - 1/2 = 1/3
1/3 of the seashells = 76
3/3 of the seashells = 76 x 3
3/3 of the seashells = 228
----------------------------------------------------------------------------
Answer: They had 228 seashells altogether.
----------------------------------------------------------------------------
Answer: This equation does not have a vertex.
If the equation is not curved or composed of two straight lines it does not have a vertex.
If you need further explanation let me know. :)
Alright so after solving it the answer would be x=2 and y= 6