Write the expression as a polynomial in standard form:

5x+4x^2(2x+7)-6x^2-9x

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.

Find the rate of change for the situation.you run 7 miles in one hour and 21 miles in three hours.

Find the solution to this system 2,1 1,-2 1,2 -1,2