Sum of 8n-n^2+12 and 7-n^2-10n

-2n^2-2n+19

Step-by-step explanation:

To find the sum of 8n-n^2+12 and 7-n^2-10n

We collect like terms

-n^2-n^2+8n-10n+12+7

-2n^2-2n+19

0

step-by-step explanation:

you can not divide by 0 so 4 ÷ 0 would be 0

0 × 9999 =0

mark brainliest   : )

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: