Is 2^ 2019 -1 a prime number?

The system of equations graphed below has how many solutions? y = 2x + 2

If f(x)= 3x+6 which of the following is the inverse of f(x)

Apool measures 12.3 feet by 16.6 feet. if the longer wall of the pool has a diagonal of 17.8 feet, what is the volume of the pool? (round to nearest tenth)