Which relation represents a function? A. {(13, 2), (13, 3), (13, 4), (13,5)}
B.
{(-2,2), (0, 2), (7, 2), (11,2)}
c. {(0, 0), (2, 3), (2,5), (6, 6)}
D. {(3,5), (8, 4), (10, 11), (10,6)}

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

Vinay constructed this spinner based on the population of teachers at his school according to vinays model what is the probability that he will have a male history teacher two years in a row

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap