1. The problem statement, all variables and given/known data 6. a) In your pocket you have some nickels, dimes, and quarters. There are 20 coins altogether and exactly twice as many dimes as nickels. The total value of the coins is $3.00. Find the number of coins of each type. b) Find all possible combinations of 20 coins (nickels, dimes, and quarters) that will make exactly $3.00. I solved part a) and got 4 nickels, 8 dimes, 8 quarters. I really don't know how to do (b). I could make a chart, but is there a mathematical procedure to doing this? I don't know how to put it in matrice form.