(3a+9)+(6a+6) =
What is the answer to this??

Which of the following contains a variable?

One positive integer is 2 less than another. the product of the two integers is 24. what are the integers?

Anita has a success rate of 80% on free throws in basketball. she wants to know the estimated probability that she can make exactly four of five free throws in her next game. how can she simulate this scenario? categorize each simulation of this scenario as correct or incorrect.