The sum of -9 and a number

In mathematics, summation is the addition of a sequence of any kind of numbers, called addends or summands; the result is their sum or total.

(x + 6) + (x-11) = 2x - 5

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:

where is abdul's work? don't see that anywhere posted : /

step-by-step explanation: