Which of the following relations is not a function

a.) (5,5), (-6,2), (5,1), (8,6)
b.) (-8,4), (4,3), (-5,1), (7,2)
c.) (9,5), (-6,2), (6,1), (-8,2)
d.) (-4,6), (4,-6), (2,0), (0,1)

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

What is the measure of ac? 5 units 13 units 26 units 39 units

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x