Yolanda paid for her movie ticket using 28 coins, all nickels and quarters. The ticket cost $4. Which system of linear equations can be used to find the number of nickels, n, and the number of quarters, q, yolanda used? n + q = 28 0. 05n + 0. 25q = 4 n + q = 4 5n + 25q = 28 n + q = 28 5n + 25q = 4 n + q = 4 0. 05n + 0. 25q = 28.