A function f (x) is one-to-one and is defined by the set {(-2, k), (-3, -2),(-5, 3), (0,5), (1,7)}. Which of the following could be the value of k?
(1) 5
(3) 3
(2) -2
(4) 0

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?