What is the slope of the line that passes through the points (9, 5) and (21, 1)? Write your answer in simplest form.

-1/3

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(1-5)/(21-9)

m=-4/12

m=-1/3

c

step-by-step explanation:

amount of oatypop that contains the prize = 40%

amount   of oatypop which doesn't contain the prize = (100-40)=60%

probability that hannah will win a prize

    = s +f s +f f s+ff   f s+ff f f s+ infinity.where f= failure,s= success

=   or 60%

probability that hannah only has to buy 3 or less boxes before getting a prize= (s) and ( f s) and (ff s) and (f f f s)

        = = 87.04 %  

step-by-step explanation: