Mr greenberg has a class of 30 students . He is drawing three names from a hat to determine a first, second and third prize . How many ways ways can he pick three prize winners

b. 2

step-by-step explanation:

the slope of a line =δy/δx

δy= y₂-y₁

δx= x₂-x₁

therefore, using the points (-2,-3)   and (3,7) we can calculate gradient as follows:

m=(7--3)/(3--2) (a number minus a negative number the sign changes to a plus)

m=(7+10)/(3+2)

=10/5

=2

the answer is 1030 it's very simple math.