Which is the correct labor for the parallel lines

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?  

Find the area of a parallelogram with base 15 yards and height 21 2/3

If a || b and e || f , what if the value of y ?