Andrew is searching for a cup and discovers that he has 20 plates for every 5 pairs of cups. if he has 40 plates, how many pairs of cups does he have?

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?  

How can you tell when x and y are not directly proportional?

Measure of angles 31 (x+4) (3x+9) me