Select from the drop-down menus to correctly identify whether the given operation is closed or not with respect to each set of numbers
1. Real numbers are (closed/not closed) under multiplication
2. Irrational numbers are (closed/not closed) under division
3. Integers are (closed/not closed) under subtraction
4. Positive rational numbers are (closed/not closed) under addition

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?  

Complete the input-output table for the linear function y = 3x. complete the input-output table for the linear function y = 3x. a = b = c =

Amira is painting a rectangular banner 2 1/4 yards wide. the banner will have a blue background. amira has enough paint to cover 1 1/2 square yards of the wall. the school colors are blue and yellow, so amira wants to add yellow rectangles on the left and right sides of the blue rectangle. the yellow rectangles will each be 3/4 yards wide and the same height as the blue rectangle. what will be the total area of the two yellow rectangles?