Alaina was asked whether the following equation is a identity (2x+1)^2-(x+1)^2=3(x+1)^2-1

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.

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers