90 - y = 3y - 70
solve for y
I ND THIS

y=40

Step-by-step explanation:

y = 40

Step-by-step explanation:

90 - y = 3y - 70

4y=160

y = 40

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: