Which set of ordered pairs represents a function

A (2,5),(1,6),(0,5),(1,10)
B (0,0),(1,1),(2,0),(3,3)
C (2,1),(3,1),(5,1),(5,4)
D (5,4),(4,5),(1,2),(1,4)

The lengths of two sides of a right triangle are given. find the length of the third side. round to the nearest tenth if necessary. a) y = 12/5x + 39/5 b) y = 5/12x + 5/39 c) y = 12/5x - 39/5 d) y = 5/12x - 5/39

The school board administered a math test to all students in grade 66 at high achievers charter school and determined that 15\%15% of them were below grade level in math. based on this data, which of the following conclusions are valid? choose 1 choose 1

Tom is buying topsoil for the flower bed shown below. one bag of topsoil covers 15 square meters. how many bags of topsoil does tom need to cover his flower bed?