Which of the following reltions is not a function? a
{(- 1, 4), (1, 6), (4, 10)}
b
{(- 1, 2), (1, 3), (- 1, 4)}
c
{(- 1, 6), (4, 7), (5, 6)}
d
{(- 1, 2), (1, 2), (3, 3)}

The variable z is directly proportional to x, and inversely proportional to y. when x is 4 and y is 13, z has the value 1.2307692307692. what is the value of z when x= 9, and y= 20

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

How much orange juice do you need to make 2 servings of lemony orange slush?