N - the number
6 × n - 11 = 6n - 11
3 - (7a + 1) =
3 - 7a - 1 =
-7a + 2 <===
(-1, 5) because if you plug in -1 to both equations, you should get 5 from both equations. They also cross at that point, making that the solution.
The answer is 14.137 cubic inches.
For this case, the radius of whole coconut is 2.5 inches (which is 5 inches / 2).
You have to subtract the thickness of the coconut from this radius for you to get the volume of the space for coconut milk.
new radius = 2.5 - 1 = 1.5 inches
Volume = (4/3)(pi)(r^3)
= (4/3)(pi)(1.5^3)
= 14.137 cubic inches