Ben has $42.50 in quarters and dimes.
a) Write a linear relation expressing the total amount of money in terms of the number of quarters and dimes
b) Write an equation to express the number of quarters in terms of the number of dimes
c) Write an equation to express the number of dimes in terms of the number of quarters.
d) Use one of your equations to determine the possible combinations of quarters and dimes Ben could have.