7. which of the following relations are not functions? select all that apply.
o
{(1,3), (3,,11), (7,15), (9,19)}
{(1,3), (1,7), (5, , 15), (9, 19)}
{(-2 1), (2,4)}
{(2,4), (1, 1), (0,,-1), (2,-4)}
{(6,,1), (2,, -,-3)}
{(1,3), (3,,11), (7,15), (9,19)}
{(1,3), (3,,11), (9,15), (9,19)}
o
o

total amount of money that he should pay if he has not used his duty free exemption is $98

step-by-step explanation:

given a united states citizen returning to the states declares the following items at the customs office: 3 shirts at $8.50 each 2 dresses at $27.50 each 1 pair of gold cuff links at $17.50 per pair. we have to find how much he pay

cost of 3 shirts if one cost at $8.50 is

cost of 2 dresses if one cost at $27.50 is  

cost of 1 pair of gold cuff at $17.50

so, total amount of money that he should pay if he has not used his duty free exemption is   $25.5+$55+$17.50=$98