Which of these relations are​ functions? a
(4,4), (5,4),​ (6,4), (7,4),​ (8,4)
b
​(4,4), (5,6),​ (6,8), (6,10),​ (7,12)
c
​(7,33), (8,30),​ (9,27), (10,24),​ (11,21)
d
(6,9), (7,19),​ (8,29), (8,39),​ (9,49)

pls help me

Which value is not a solution of 8x^3 – 1 = 0

If angle 2=3x +1 and angle 3=2x +4what is angle 2

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?