Multiple choices, please help me XD Identify all of the functions below.
O { ( 5 , 1 ) , ( 2 , 2 ) , ( 6 , 6 ) , ( 3 , 4 ) , ( 1 , 1 ) }
O X Y
7 3
0 5
1 3
5 5
3 0
O { ( 5 , 1 ) , ( − 5 , 2 ) , ( 2 , 6 ) , ( 6 , 4 ) , ( − 2 , 1 ) }
O { ( 5 , 1 ) , ( 2 , 2 ) , ( 2 , 6 ) , ( 2 , 4 ) , ( 1 , 1 ) }
O { 3 , 5 , 9 , 7 , 7 }

O X Y
2 3
2 5
1 3
8 2
5 0

You’re repairing a large rectangular aquarium. the final step is to cover the glass with a protective film. the front and back of the aquarium measure 4 meters by 2 meters, and the sides of the aquarium measure 3 meters by 2 meters. how many square meters of protective film do you need? ( )

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.