What's the algebraic expression represents the phrase? cindy studied seven more hours than nikki studied. a. n + 7 b. 7 - n c. 7n d. n/7

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Arestaurant gives out a scratch-off card to every customer. the probability that a customer will win a prize from a scratch-off card is 25%. design and conduct a simulation using random numbers to find the experimental probability that a customer will need more than 3 cards in order to win a prize. justify the model for your simulation, and conduct at least 10 trials.

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8