What is the sum of 2 times the square root of 7

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

What is the distance between the points (2 -3) and (-6 4) on the coordinate plane

Aschool puts on a play. the play costs $1,200 in expenses. the students charge $4.00 for tickets. there will be one performance of the play in an auditorium that seats 500 people. what is the domain of the function that shows the profit as a function of the number of tickets sold?