John has 15 nickels, 7 dimes and 9 quarters. How much money
does John have in dollars?

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. 4+3/7x-2-2/7x a. 2-5/7x b. 6-1/7x c. 2+1/7x d. 6+5/7x

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1