Write an expression for "the sum of ddd and 999."Write an expression for "the sum of ddd and 999."vWrite an expression for "the sum of ddd and 999."Write an expression for "the sum of ddd and 999."Write an expressio

d+9

Step-by-step explanation:

By the sum of two numbers, we mean the addition of the two numbers.

For example, the sum of 3 and 5 is given as:

3+5=8

However when one of the term is an unknown, we simply add and the value of the unknown can only be found if we are given more information.

Therefore:

The expression for the sum of d and 9 is written as:

d+9

is there a picture

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: